Topic: two list of topics
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	Roll of film		2021-11-20
		From Brian: Trying to create a formula to calculate the build up on a roll of film is calculated. Except instead of of a roll, it's essentially a rectangle with two semicircles on each at the end. Example: I start with a 6" diameter core on each side, and I start winding .005" thick film on the core. The distance between the center of those cores, length of the inner rectangle is 7.125. If I continue to do this for a total length of film of 3000 feet, what will the roll length and width be. So what I need is the formula to perform this type of calculation. Can you help me? I want to be able to plug the formula in a spread sheet and to be able to input a core diameter, a film thickness and a total length and the length between the center of the two cores(which is the inner rectangle's length I'm assuming). Thanks Answered by Harley Weston.
	Multiplying and adding two numbers		2021-02-06
		From Yvonne: Two numbers multiplied to get -13 and added to get -12 Answered by Harley Weston.
	Comparing two job offers		2020-11-17
		From Selena: Raja has been offered two jobs. Each of these jobs takes 24 weeks to complete. One job pays $3440 every 8 weeks. The other job pays $2700 every 6 weeks. Raja wants to accept the job that pays more per week. Show how to use equations to help Raja make her choice. Answered by Penny Nom.
	Two equations with fractions		2020-10-22
		From mia: I am supposed to look for x and y. my teacher didn't explain very well. please help : (( 2x - y = 5 x/4 + y/3= 2 Answered by Penny Nom.
	More on the last 2 digits of a^k = N		2020-08-07
		From Jay: I've seen solution methods for finding the last 2 digits of a^k = N, where a and k are known. My question is: What if the number N is known and the last 2 digits are, say, ...62. Is there a way to find, for any given a, the value of k which will result in a number where the last 2 digits are ...62? and if that is possible, then do the same for a number with the last n digits (say 7 or 53 or something)? Answered by Harley Weston.
	Two chords		2020-04-14
		From Frank: How to find the length of the radius of a circle if you know the lengths of two chords Answered by Penny Nom.
	A hexagon constructed from two triangles		2020-04-13
		From sunny: Triangles AEC and FDB are equilateral triangles and EA= DF= 12cm. The polygon at the center of the star is a regular hexagon. What is the area of the hexagon? Answered by Penny Nom.
	The area of a triangle from two angles and a side		2020-02-10
		From Chinmoy: How to measure the area of a triangle with two angles and length of the included side known? Answered by Harley Weston.
	Two digit numbers		2019-12-03
		From Lacy: Using the digits zero through nine, how many two-digit numbers can be formed,which do not have a four or five? Answered by Penny Nom.
	Can one equation with two variables be solved algebraically?		2019-08-30
		From Don: Can one equation with two variables be solved algebraically? Answered by Penny Nom.
	Two circles		2019-05-23
		From Arman: Two concentric circles have their centres at point C. The radius of the smaller circle is 8 cm. The length of chord AB is 26 cm and is tangent to the smaller circle. What is the circumference of the larger circle? Answered by Penny Nom.
	Two numbers		2019-05-03
		From fds: The difference of two numbers is 2, and their sum is 4. What are the two numbers? Answered by Penny Nom.
	A dice game		2019-03-17
		From Remo: So, little game my kid came up with. Dice are standard d6. I roll a die, he rolls a die. If he gets the same number as me OR a bigger number he wins. So far so good. Used the opportunity to get him to calculate the probabilities of him winning, see if I could get him interested into looking at this game from a more academic perspective. He did fine. Then we upped the ante. He rolls one die, I roll two dice. I his die has a number that is equal or greater than both of mine, he wins. We had a bit of trouble solving that one, and had to resort to a table with all the results ( 6x36) to figure out where we stood. Then again we upped. He rolls two dice, I roll two dice. If any one of his dice has a number equal to or greater than both of mine he wins. I only win if one of my dice is greater than both of his. And we got stuck. Figured I would need to find a formula to resolve this one, as our earlier solution ( table everything ) suddenly is 36x36, giving well over a thousand possible results. And if we ever go bigger than that then we *really* are going to need another way to calculate it. Answered by Harley Weston.
	Adding and multiplying two numbers		2019-02-13
		From katie: what 2 numbers add to get 7 and multiply to get 2? Answered by Penny Nom.
	y=lnx+(1+ln2)/2 and y=x^2		2019-01-28
		From Mike: Prove that y=lnx+(1+ln2)/2 and y=x^2 touch each other. The course is about logarithm and root functions... how should I solve this problem? Answered by Penny Nom.
	Two integers X and Y are selected at random		2018-12-31
		From Kenneth: Two integers X and Y are selected at random from the integers 1 to 8.If the same integer may be selected twice,find the probability that; 1)X-Y=2 2)X-Y is 5 or more 3)X is greater than Y Answered by Penny Nom.
	Ten games with two possible outcomes for each game		2018-12-22
		From Jin: I'm trying to make a list to view all the possibility. An example is if I have 2 games there's two outcomes (home/away) I will use number to represent the teams. 0-1,2-3 All possible out comes are 0-2,0-3,1-2,1-3 right? MY QUESTION If I have 10 games each have 2 outcomes (home/away) to win What is all possible outcome. 0-1,2-3,4-5,6-7,8-9,10-11,12-13,14-15,16-17,18-19 Could u please provide me with a list of all possible out comes Thanks you Answered by Penny Nom.
	The height of a tower		2018-12-12
		From Pandey: Hello sir plz solve this question. If the shadow of a tower is found to be 10.5m longer when the sun's altitude is 45°AND60°. Find the height of the tower. Answered by Penny Nom.
	Two cones formed from two circular sectors		2018-11-30
		From APARNA: The central angles of two sector of a circle are 60° and 120° . Using these sectors two cones are made. If the radius of the smaller cone is 5 cm, find the radius and base area of the larger cone. Answered by Penny Nom.
	Two curves		2018-09-23
		From Megan: How do i find the interception points of xy=-2 and y=x+3? Many thanks! Answered by Penny Nom.
	The sum and difference of two numbers		2018-09-17
		From Feni: The sum of two numbers is 4. The difference of the two numbers is 2. What are the two numbers? Answered by Penny Nom.
	The sum and difference of two numbers		2018-08-30
		From Saranya: Hi, The question is to find the numbers from sum and difference. The Sum = 14 and the difference = 2 I found in this web site some useful answers. but my kid is going second grade only. She don't know how to do a division or multiplication. So can you please explain on how to find the answer using only the Addition and Subtraction. Thanks in advance. Answered by Penny Nom.
	Two intersecting tubes		2018-08-15
		From Tommy: Hi, I am trying to determine a mathematical model for two metal tubes joining at various degrees for weld. For instance, if I am trying to join the end of a tube to the side of another at a 90 degree angle, it will be a simple profile cut out of the joining tube. Where it gets tricky is if you want to join the new tube at a given angle. It would be very helpful if you could give insight as to how I can solve this problem or an equation I could work off of. Thanks for the help!! Answered by Edward Doolittle.
	The product of two numbers		2018-06-19
		From amie: the product of two numbers is 108.when the larger number is divided by the smaller number the quotient is 3. What are the number.tnx Answered by Penny Nom.
	Are those two equations the same?		2018-06-05
		From Francisco: Solve for y: 2(x+3)=y x=5 Solve for y: (x+3)2=y x=5 Are those two equations the same? Answered by Penny Nom.
	The difference between two numbers is -3		2018-06-05
		From Hannah: write a pair if integers whose difference is -3 ( given that the greater number is 8 ) Answered by Penny Nom.
	Two expressions for the perimeter of a a rectangle		2018-05-13
		From Slayde: A rectangular house has one side 4 metres longer than the other. Create two different expressions for its perimeter. The expressions should be given in factorised and expanded form. Answered by Penny Nom.
	Rolling 2 dice		2018-04-06
		From Jose: Find the probability p that the sum is as stated when a pair of dice is rolled. (a) Even and doubles. p= (b) Even or doubles. p= Answered by Penny Nom.
	A circle problem		2018-03-30
		From ahamed: the diameters of a circle AB and CD intersect each other at O perpendicularly. Then a chord DF is drawn. AB and DF intersect at E. DE=6cn and EF=2cm.find the area of thw circle Answered by Penny Nom.
	A circle and two chords		2018-03-21
		From Ella: In a circle, a 30 unit chord is 5 units closer to the center than a 20 unit chord. Find the radius. Answered by Penny Nom.
	The sum and difference of two numbers		2018-03-13
		From samima: Two numbers have a difference of 0.85 and the sum 1.What are the numbers? Answered by Penny Nom.
	Dividing a region in half		2018-02-24
		From mandy: There is a line through the origin that divides the region bounded by the parabola y=4x−5x2y=4x−5x2 and the x-axis into two regions with equal area. What is the slope of that line? Answered by Penny Nom.
	Adding two negatives		2018-02-04
		From Pinasshakoane: (-23)+(-3) Answered by Penny Nom.
	The sum and difference of two numbers		2018-01-25
		From Ali: Hello, I was looking at the original question that was posted and answered by your team: http://mathcentral.uregina.ca/QQ/database/QQ.09.07/s/donna1.html I used the 7 and 4 as example and not looking for 39 per original question: A=7 B=4 7+ 4 =11 and 7-4 = 3 We end up with 11 +3 = 14 A= 14/2 give use 7 B = how do you solve for B or 4 with out knowing anything about 3 or any other numbers ? Thank you Ali Answered by Penny Nom.
	Average price		2017-09-15
		From Annette: If I sold a widget at $15.50 17.5% of the time and $16.50 88.5% of the time what is the algebraic expression for that. How do I arrive at an average price Answered by Penny Nom.
	An impossible problem		2017-09-15
		From Fay: Given math homework problem of: Gary and Larry given 2 numbers and told to add together. Gary subtracted and got 14. Larry multiplied and got 799. I tried substitution: X-Y=14 and X x Y=799 X= Y+14 (Y+14) Y=799 and here I'm stuck at Y squared+14 Y= 799 using substitution I got 47x17=799 but not 14b when subtracted. HELP????? Answered by Penny Nom.
	The angle between two planes		2017-09-12
		From Arthi: Hello. hope you are having a good day. I am stuck on a maths question in which it is asking, how to find the angle between two given planes. These planes are in a 3D shape such as a prism. How can I do this? Please reply as soon as possible Thank You Answered by Penny Nom.
	Two circles		2017-08-13
		From Ladines: Find the equation of the circle passing through points of intersections of circles x²+y²=4y and x²+y²=2x and the center is on line y=2 Answered by Penny Nom.
	Two digit numbers that contain 5		2017-08-11
		From Irish: How many two digit numbers contain the digit 5? Answered by Penny Nom.
	Two consecutive odd integers		2017-07-14
		From Adeeb: Find two consecutive odd positive integers, sum of whose square is 290. Answered by Penny Nom.
	Algebra		2017-05-28
		From Kerim: I need to solve this equation. y=at^2 - 2at x =2a√t Express y in terms of x and a Give in the form y=(x^p/ma^3) - (x^q/na) where p,q,m and n are integers Answered by Penny Nom.
	Two wires between two buildings		2017-05-11
		From Bill: I need to find the height of the intersection point of two building wires< br /> Building A is 860 feet high and building B is 480 feet high. The wires existent from the top of one building to The bottom of the other < br /> The distance between is 32 feet Answered by Penny Nom.
	The sum and difference of two numbers		2017-03-20
		From Olivia: The sum of two numbers is 87 and their difference is 29. What are the two numbers Answered by Penny Nom.
	How far apart are the boats?		2016-12-13
		From Halley: Two boats leave port at the same time. Boat A travels east at a speed of 12 km/hr. Boat B travels southwest at a speed of 14 km/hr. After two hours, how far apart are the boats? North is 0 degrees. How do I figure this out. Thanks Answered by Penny Nom.
	Two equations		2016-09-17
		From Nilesh: How to solve (x-y)^1/2 + 3(x-y) = 30 ; xy + 3(x-y) = 11? Answered by Penny Nom.
	Two sequences		2016-08-20
		From Ting: The first four terms of a sequence are 4, 20, 56 and 120. By comparing with the nth term of sequence 1,5,14 and 30 which is 1/6n(n+1)(2n+1), find a formula for nth term. Can you precisely show out how you do this questions ( with the steps please) Answered by Penny Nom.
	Two lots		2016-08-08
		From Deniece: I have 2 lots that are joined together. One lot is 38' X 105' and the other is 45' X 105'. What is the total in acre size. Or, how close are these lots to make one full acre? I want to sell both lots and want to advertise using the total lot size. Thank you. Answered by Penny Nom.
	The difference between the ares of two rectangles		2016-06-09
		From Ingrid: I am trying to help my son with an area question. I have the answer, from the solutions, but I cannot figure out how to teach him. Question: Two rectangles have lengths 13cm and 19cm respectively. Their total area is 376cm squared. If both their widths are whole numbers, what is the difference in their areas? I know that this is solvable once I determine the widths of the rectangles , but how do I go about finding that? Thanks for your help Answered by Chris Fisher and Harley Weston.
	Two pieces of rope		2016-05-21
		From Render: Fred cuts a 12- inch piece of rope. Then he cuts a second piece of rope that is 3/2 longer than the first piece. Is the second piece shorter or longer than the first piece? Explain. Answered by Penny Nom.
	Two tax rates		2016-04-21
		From Vishal: Total amount paid annually $444 for 2014 which is inclusive for tax. tax rate for first six month is 7% then it is changed to 15% for second six months. calculate the total basic amount paid before tax. the basic amount on which tax paid in first and second six month is same. Answered by Penny Nom.
	The last two digits of a phone number		2016-04-03
		From Joshua: I want to find the last two digits of a phone number whose first eight numbers of a ten digit phone numbers are known. Answered by Penny Nom.
	A 2 digit number		2016-02-08
		From Lloyd: The sum of digits of a certain 2 digit number is 7. Reversing its digits increases the number by 9. Find the number Answered by Penny Nom.
	A two car competition		2016-02-02
		From Christian: Question: Two cars are racing to a fixed point and back. One car travels 70 MPH both ways While the other travels 60 MPH there and 80 MPH back, which car won the race? It is not a tie. Answered by Penny Nom.
	Linear equations in two variables		2015-12-13
		From priya: I have problem in solving these equations please help me today itself very urgent: I)2x+y=y II)pie*x+y=9 Answered by Penny Nom.
	The line of intersection of two planes		2015-12-09
		From Rabz: Determine the vector equation for the intersection between the two given planes 2x+7y equal to 14,x+z equal to 7 Answered by Penny Nom.
	A common tangent to two general parabolas		2015-11-15
		From Kind: Hi, I want to find the common tangent of two general parabolas, but i don't know if it's possible or not. If it's possible, please make a tutorial. The first parabola equation : Ax^2 + Bxy + Cy^2 + Dx + Ey + F = 0. The second parabola equation : Gx^2 + Hxy + Iy^2 + Jx + Ky + L = 0. I need this because i want to find the equation of Beloch fold. (Huzita - Hatori 6th axiom) However if you know any other method to find Beloch folds equation, I am open for any suggestions. Answered by Chris Fisher.
	The area of two lots		2015-10-13
		From Lynn: I have 2 lots that have mobile homes on them... I was told they were 100 x 200 lots.. I have tried to calculate it on here but was not able to understand how to exactly do it. I would like to know if I have a 1/2 acreage or exactly what the 2 lots are? Answered by Penny Nom.
	A two digit number		2015-08-21
		From Cameron: Write the 2 digit number that matches the clues. My number has a tens digit that is 8 more than the ones digit. Zero is not one of my digits. My number is ________. Answered by Penny Nom.
	A two digit number		2015-06-05
		From Madison: Trini took some photos. The number of photos she took is a two digit number. The sum of the digits is 11. The tens digit is 3 more than the ones digit. How many photos did Trini take? Answered by Penny Nom.
	The weight of two dogs		2015-03-17
		From Renee: Darlene's dog weighed 5 times as much as Leah's dog. Together, the dogs weighed 84 pounds. How much did each dog weigh? Write an equation and solve Answered by Penny Nom.
	Two-tiered GST system		2015-03-14
		From Ruby: This question showed up in one of my Math assignments and nothing on the internet seemed to help me find a way to calculate it. A certain country has a two-tiered GST system. For the first $1500 of any item, GST is levied at 10% and any amount over $1500 is levied at 15%. Determine the amounts that give the following GSTs. a) $350 b) $780 Answered by Penny Nom.
	Two equations		2015-02-16
		From nigel: 2x+1/2y=1 6x-3/2y=21 Answered by Penny Nom.
	Jack and Jill climb two poles		2015-02-02
		From APRIL: Two vertical poles are 3 meters apart. Jack is climbing one pole while Jill climbs the other. If the distance between Jack and Jill is 5 meters, how much higher is Jill than John? Answered by Penny Nom.
	Two quadratic equations		2014-11-20
		From rajesh: Sir, I would like to discuss on question- -Find the value of variable X and Y, equations are X2+Y2+2XY=25 X2+Y2-2XY=1 Sir, my point is equation looks not so easy.My opinion is there many (more than 4)value possible for both X and Y. Kindly help me. Waiting for your response. regards, rajesh Answered by Penny Nom.
	Two equations in x and y		2014-09-25
		From seyilogo: solve y=2x - 3 and (4x - 2y) / x + y = 1 simultaneously Answered by Harley Weston.
	Two equations in two variables		2014-09-18
		From Susan: (28x + 36y) - [20000 - .75(28x + 36y) + 60000] = 5000 x + y = 10000 solving two equations involving variables Answered by Penny Nom.
	A second grade word problem		2014-09-09
		From Beth: How do I explain to my second grader how to find the answer to the problem: My tens digit is 8 more than my ones digit. My ones digit can not be zero. Answered by Penny Nom.
	A secret number		2014-09-08
		From jai: it is smaller than half of 100, it is more than 4 tens and less than 5 tens, the tens digit is two more than the ones digit , together the digits have a sum of 6..... What is my secret number? Answered by Penny Nom.
	The sum of two numbers is 52		2014-09-01
		From Blake: The sum of two numbers is 52 and the difference is 10. What are the numbers? i used to be real good at this stuff? Answered by Penny Nom.
	Two regression lines		2014-06-14
		From catherine: Given a set of data values ,we can get two regression lines .Explain. Answered by Robert Dawson and Penny Nom.
	Two, 2-digit numbers		2013-09-24
		From Tony: Write a problem that has two 2-digit numbers. solve your problem. Answered by Penny Nom.
	A two digit number		2013-09-04
		From JEFFERSON: The sum of the digits is 6. When the digits are interchange, the new number represented is 3 time the 10 digit of the original number. Find the original number? Answered by Penny Nom.
	Two numbers whose difference is 16		2013-06-08
		From Johan: Two numbers whose difference is 16 and whose sum is 120 Answered by Penny Nom.
	Two overlapping circles		2013-05-22
		From Alexandra: There are two overlapping circles. The two non-overlapping regions have areas A and B. As the area of overlap changes, the values of A and B also change. Prove that no matter how big and small the overlap is, the difference between A and B is always the same. Answered by Penny Nom.
	An equation in two variables		2013-05-14
		From Steve: Verify solutions to an equation in two variables. 4x-2y=8 (3, 2) Answered by Penny Nom.
	Multiplication in base two		2013-02-01
		From Michael: multiply in the indicated base 110two*11two Answered by Penny Nom.
	Two congruent circles in a rectangle		2012-10-20
		From Alexander: Have you ever solved a problem, in which you have a rectangle, from which you need to cut the largest two circles of equivalent diameter? I bisected a rectangle diagonally, but the circles, while tangent to two of the sides, are not tangent to eachother. Can you devise a method for two equivalent circles, that are tangent to two sides, are also to eachother? Take for example a piece of paper, Each if the two largest circles has a diameter that is greater than the distance to the midpoint of the diagonal bisector of the rectangle. Answered by Chris Fisher.
	A common chord to two circles		2012-04-22
		From Nicole: What is a common chord between two circles and how is it found in the problem: Two circles intersect and have a common chord, the radii of the circles are 13 and 15, the distance between the circle's centers is 14, find the common chord. Answered by Penny Nom.
	Two circles		2012-02-08
		From crisfe: find the point where the common cord of the circles x2+y2=25, x2+y2-12x-6y+35=0 process there line centers. what point they intercepts? Answered by Penny Nom.
	A number less than 100		2011-09-17
		From Sharon: I am a number less than 100. My ones digit is 6 the sum of my digit is 11. What sum am I? Answered by p.
	A two digit number		2011-08-26
		From Felicia: Write the 2-digit number that matches the clues. My number has a tens digit that is 8 more than the ones digit. Zero is not one of my digits Answered by Penny Nom.
	Coefficient of variation		2011-04-14
		From Braden: When determining coefficient of variation (CV) or %CV is it possible to calculate %CV for two variables? For instance can %CV be used to determine the precision of 5 data points on a graph using the X and Y coordinates? or does %CV need to be determined for each variable separately? Answered by Robert Dawson.
	A two digit number		2011-03-01
		From jhoanna: the sum of the digits of a two digit number is 10. The value of the number is 16 times the units digit.Find the number. Answered by Penny Nom.
	Golf pairings		2010-12-17
		From AL: I have a golf tourney where we have fourteen players and are playing five times/rounds of golf. I am trying to pair up two threesomes and two foursomes so we don't play with the same person twice or the least amount of times. Answered by Victoria West.
	What is the speed of each car?		2010-11-04
		From Jennifer: two cars are 420 miles apart and traveling towards each other along the same road. They meet in 3.5 hours. One car is traveling 15mph slower than the other. What is the speed of each car? This must be solved using a system of equation, I have no idea? Answered by Stephen La Rocque.
	Two cars on a circular track		2010-08-12
		From david: If two cars starts to drive at point 1 and go in a circle when will they meet? (one cars speed is faster the other ) all I need is a formula Answered by Tyler Wood.
	The intersection of two graphs		2010-06-27
		From Austin: In depth explanation of how to find the intersection points of functions y=-4t+300 and y=-4.9(t-5)^2+300 Answered by Stephen La Rocque.
	Two overlapping circles		2010-04-12
		From Scott: There are two circles, big circle with radius R and small one with radius r. They intersect and overlap in such a way that the common area formed is 1/2 pi r^2 (half the area of the small circle). The Question is: suppose we have known the radius r of the small circle, and the distance between the two circle centers, what should the radius R of the large circle be? Answered by Chris Fisher.
	A system of equations		2010-03-30
		From samantha: the equations of two lines are 6x-y=4 and y=4x +2.what is the value of x in the solution for this system of equations? Answered by Penny Nom.
	A negative times a negative		2010-03-25
		From priya: why is minus into minus plus? Answered by Harley Weston.
	The angle of intersection between two lines		2010-03-25
		From Madhumitha: How to find the angle of intersection between a line x=249 and another line which is of the form y=m*x+c; Line1 has a slope of infinity so what does the angle of intersection turn out to be? Or how can i find it? Answered by Chris Fisher.
	Substitution		2010-02-14
		From Izayah: what is 3 ways to find the meeting point of y=2x+4 and 3x+y=7 by making 2 table and using a graph Answered by Stephen La Rocque.
	The average over two semesters		2010-01-20
		From edy: 6 courses have an average of 100 in the first semester 5courses have an average of 90 in the second semester what is the average of the two semester , method of calculation , how come to have 95.4545 Answered by Penny Nom.
	A networking event		2010-01-07
		From Tricia: I have 70 people to go around to 10 tables with 7 at each table. only 6 from each table will rotate each time. There is 1 table monitor that always stays at same table. How do I make the rotation so everyone moves and gets to see all 70 people at the networking event? Answered by Robert Dawson.
	Two percent		2009-12-20
		From Brian: Hello I am having a problem figuring out something. Someone told me that .98 is the same as 2% how is this possible, how did they figure this out here is my example 929.79 x .98 = 911.19, is the same as 929.79 x 2% = 18.59, now minus the 18.59 and you will end up with 911.19, how did they convert 2% to .98, please help thgis is driving me nuts as I am not very good at math. Thank you Warmest Regards Brian Answered by Penny Nom.
	How fast is the distance between the two cars decreasing?		2009-12-08
		From Jenny: Two cares are on a collision course toward point P. The paths of the two cars make a 30 degree angle with each other. The first car is 40 km from P, and traveling toward P at 16 km/hour. The second car is 50 km from P, traveling at 20 km/hour. How fast is the (straight line) distance between the two cars decreasing. (Hint: Law of Cosines) Answered by Harley Weston.
	Solving two equations, one with a square root		2009-11-23
		From kacie: y = square root of x+3 x-4y = -7 im having trouble with this problem...i have to find where they intersect. Answered by Harley Weston.
	The point of intersection of the pair of straight lines		2009-11-19
		From Stephanie: Find the point of intersection of the pair of straight lines: y=-3x-9 -y=4x+2 x = _______ and y = ________ I am totally confused. Please help Answered by Robert Dawson.
	The intersection of two graphs		2009-10-30
		From asma: by using the suitable scales,draw both the graph of x/2 + y/4 =3 and y=2 on the same graph paper.Find the points of intersection of the two graph. Answered by Penny Nom.
	Two rectangles		2009-10-08
		From Lillian: A rectangle is 5cm longer than twice its width. The width of another rectangle is 3cm less than the width of the first rectangle and its length is 6cm more than 3 times its width. If the perimeters are equal, find the dimensions of both rectangles Answered by Penny Nom.
	Two equations in two unknowns		2009-09-18
		From Citizen: x+-3y=7 -x+4y=7 Answered by Penny Nom.
	The method of substitution		2009-09-17
		From laura: ok! i really need help with this question plz help!! x= - 4y +5 x+2y = 7 Answered by Penny Nom.
	Fact families		2009-08-24
		From Camasha: I am trying to help my daughter with fact families. I understand the premise from your previous explanation on the site . Generally when applying addition and subtraction their are two add and two subtraction utilizing all three numbers. However what do you do when you have a series like like 9, 9, 18 Answered by Penny Nom.
	Two cars		2009-08-09
		From Jayna: If a car was traveling 20mph east and another car was traveling 30mph west, assuming they were 300 miles apart, at what point would they collide at the center? Answered by Penny Nom.
	Two circles		2009-08-03
		From Karan: We are given 2 circles with radii 12cm and 3 cm. We have to find AB Answered by Penny Nom.
	Two equations in two unknowns		2009-07-30
		From Alicia: I need help with the following equation please show me the steps to complete so that I will know how to do this my self. 2x-y=2 5x+y=5 Thanks for the help Answered by Penny Nom.
	A rotating schedule		2009-06-10
		From Doreen: We have seven people - we want to create a rotating schedule for two people at a time to attend one day a week with each person working the same amount of days in the year. Answered by Victoria West.
	Two equations		2009-05-31
		From tony: y = 1.2x - 32.7, y = -0.7x + 46.15 can you please solve this for me? i am not able to figure it out... thank you tony Answered by Penny Nom.
	Two trains		2009-05-18
		From chris: Train A passes a station at 3:15am going 40mph. Train B passes the same station at 3:27am going 50mph. At what time will Train B catch up with Train A? Answered by Stephen La Rocque.
	Two equations		2009-05-18
		From Bob: solve the system: x/2 - 2y= -8 3x + 2/3y= -10 Answered by Stephen La Rocque.
	Two dice and the difference of squares		2009-04-21
		From dave: I dont understand how to do this: Two fair dice are rolled. What is the probability that the difference of the squares of the numbers is divisible by three? the answer is 5/9 Answered by Harley Weston.
	wo consecutive numbers with a product of 9506		2009-02-25
		From sofie: find two consecutive numbers with a product of 9506 Answered by Penny Nom.
	The substitution method		2009-02-06
		From amber: Pleasse help me with this problem x+y=-2 y-2x=1 Answered by Penny Nom.
	The intersection of two lines		2009-01-30
		From kaylee: how do you find and graph the intersect of these two equations: y=2x-4 (and) 2y=x thanks, kaylee Answered by Stephen La Rocque.
	The point of intersection of the straight lines		2009-01-18
		From Kieran: Find the point of intersection of the straight lines y=2x+4, and y+2x-16=0 Answered by Robert Dawson and Penny Nom.
	The area of a region bounded by two curves		2009-01-07
		From Rogerson: Find the area, S, enclosed by the given curve(s) and the given line. y = x^2 - x - 1, y = x+2 Answered by Harley Weston.
	The area enclosed by a curve and the x-axis		2009-01-04
		From Rogerson: Find the area, S, enclosed by the curve y = -x^2 + 6x - 5 and the x-axis in the interval 0≤x≤4. Answered by Harley Weston.
	The angle between two lines		2008-12-17
		From abhi: how to calculate the angle between two lines, given the length of the lines.. angle should vary from 0 - 360 in the counterclockwise direction Answered by Robert Dawson and Harley Weston.
	Two numbers		2008-12-15
		From HERB: I am thinking of two whole numbers. When I add them , their sum is 123. When I subtract the lesser number from the greater number their difference is 45. What are my numbers? Answered by Penny Nom.
	Two inequalities		2008-10-08
		From s: 3y > 4x 2x-3y>-6 Answered by Stephen La Rocque.
	The region between two circles		2008-09-24
		From Carol: Good day! Here is a picture of the problem that we need to solve. (I send the picture through e-mail.) A small circle is inside a larger circle, the only given in the problem is the chord of the larger circle tangent to the smaller circle which measures 16cm. The question is, what is the area of the shaded region? Can you answer this question? Thanks! :) Answered by Harley Weston.
	Two Step Equation		2008-09-17
		From calea: i really dont now what two-step equation means? Answered by Janice Cotcher.
	A line through two points		2008-09-10
		From Conor: Find the equation of the straight line which passes through the points (-2,14) and (8,-1) Answered by Penny Nom.
	Solve for y in terms of x		2008-08-10
		From Rosie: Solve equation for y -4x=12+3y Answered by Penny Nom.
	Two equations in two unknowns		2008-08-01
		From James: Question from james, a student: 3x+2y=9;24x-2y=18 My math teacher says that it is (2,-4) Can someone please explain how to figure this out by graphing? Answered by Victoria West.
	Two numbers		2008-07-19
		From Jerry: while driving in my car early this morning, i 'discovered' something and want to ask if there is an equation that would fit it... Here it goes..... take any two numbers (with the exception of two of the same numbers), multiply the first number by 2, add the difference of the original two numbers, and the outcome will be the same as if you added the original two numbers together... example: 3+5=8... thus, 3+3+(5-3)=8... if you chose to reverse the numbers then..... 5+3=8... thus, 5+5-(5-3)=8 i know, simple stuff.. but i just want someone to tell me what exactly this is.. is there a 'law' that describes this? Answered by Victoria West.
	equation?		2008-07-19
		From Jerry: while driving in my car early this morning, i 'discovered' something and want to ask if there is an equation that would fit it... Here it goes..... take any two numbers (with the exception of two of the same numbers), multiply the first number by 2, add the difference of the original two numbers, and the outcome will be the same as if you added the original two numbers together... example: 3+5=8... thus, 3+3+(5-3)=8... if you chose to reverse the numbers then..... 5+3=8... thus, 5+5-(5-3)=8 i know, simple stuff.. but i just want someone to tell me what exactly this is.. is there a 'law' that describes this? Answered by Victoria West.
	Two numbers whose sum is 25 and whose product is 120		2008-07-10
		From Michelle: Solve the following problem in at least two different ways. Find two numbers whose sum is 25 and whose product is 120. I know how to solve this problem by creating two equations x+y=25 and xy=120 and then use substitution. Are there any different ways of solving this problem? Answered by Janice Cotcher and Penny Nom.
	Probability and two digit numbers		2008-07-07
		From Peter: What is the probability that if you multiply two randomly selected two digit whole numbers, the result is greater that 100 and less than 200. Express your answer as a common fraction. Answered by Janice Cotcher.
	The sum of the digits of two-digit number is 9		2008-07-01
		From Audrey: the sum of the digits of two-digit number is 9. if the digits are reversed, the new number if 63 greater than the original number. find the number. Answered by Penny Nom.
	g(m-1,2n)+n		2008-06-07
		From Florence: What does g(m-1,2n)+n for m>0, n>=0 mean. Answered by Penny Nom.
	A tangent to two circles		2008-04-13
		From erson: find the length of the tangent segment AB to two circles whose radii are a and b respectively, when the circles touch each other. the illustration looks like this...hope you'll understand... there are 2 circles - one is big one is small. they touch each other. and there is this irregular 4 sided polygon that connects them...there is a line that connects them from their center point and another from the tip of the circles...and that's it...i cannot explain very well please bear with me Answered by Stephen La Rocque.
	Fact family		2008-02-21
		From Anand: Can you think of a fact family that has only two facts? Write the fact family Answered by Penny Nom.
	Two equations in x and y		2008-02-01
		From leslie: 6x+8y=40 4x+5y=25 Answered by Penny Nom.
	The sum of two numbers is 36		2008-01-14
		From May: The sum of two numbers is 36. Their product is 320. What are the two numbers? Answered by Penny Nom.
	Find the equation of a line given two points		2007-10-05
		From Tiffany: The equation for the line through the points (11,2) and (18,12) can be written in the form Ax+By=C. Find A and B. Answered by Victoria West.
	Finding equations, intersection point of two lines at right angles		2007-09-22
		From Yaz: Find the equation of the line joining A(-1,-9) to B(6,120). Another line passes through C(7,-5) and meets AB at rigth angle of D. Find the euation of CD and calculate the co-ordinates of D. Answered by Stephen La Rocque.
	How many two digit numbers contain at least one 7?		2007-09-06
		From Janet: How many two digit numbers contain at least one number seven? Answered by Penny Nom.
	Two-column proof for a circle geometry problem		2007-08-24
		From Kendra: i have to prove that tangents to a circle at the endpoints of a diatmeter are parallel by stating whats given, whats to prove and a plane, then write a two column proof i dont understand this Answered by Stephen La Rocque.
	Who am I?		2007-04-24
		From Lisa: I am the largest two digit number whose units digit divides its tens digit evenly. Who am I? Answered by Stephen La Rocque.
	One equation with two unknowns		2007-04-20
		From Devon: Solve for y. 3x – 2y = 12 Answered by Penny Nom.
	A two-digit number is five times its units digit.		2007-02-21
		From Pamela: A two-digit number is five times its units digit. If the digits are reversed, the resulting number is 27 more than the original number. Find the original number. Answered by Gabriel Potter and Penny Nom.
	Dividing money unequally		2007-02-06
		From Linda: I have a total of $13,826.48. It is to be divided by 15 kids - 2 of the kids only get half of what the other 13 do - how much do the 13 get and how much does the 2 get? Thanks Answered by Haley Ess and Steve La Rocque.
	Two cones		2006-12-30
		From Cassie: A cone of radius 6 and height 12 and a different cone of radius 8 and height 12 intersect as shown in the figure below, where the vertex of one matches with the center of the base of the other. Find the volume of the intersection of the two cones (in exact form). Answered by Penny Nom.
	The product of of two rotations		2006-12-17
		From Katie: Is the product of of two rotations over a different center point always a translation? Answered by Walter Whiteley.
	Four two-digit numbers		2006-12-02
		From Mary: I have four two-digit numbers written on my paper. The sum of these 4 numbers is less than 100. True or False - each number is less than 25 If all the numbers on my paper are different, what is the largest (two-digit) number I could possibly have written. Answered by Stephen La Rocque.
	The last two digits		2006-07-22
		From Sam: You have answered this question already but you only answered to one digit. What are the last TWO digits of: 3 to the power of 1994 7 to the power of 1994 3 to the power of 1994 + 7 to the power of 1994 7 to the power of 1994 - 3 to the power of 1994 Answered by Paul Betts and Penny Nom.
	Prove that a rhombus' diagonals are perpendicular		2005-10-02
		From Tania: How do you prove that a rhombus' diagonals are perpendicular using the 2 column proof method? Answered by Walter Whiteley.
	Solve for a and t		2004-10-23
		From Justin: How do I solve for "a" and "t" in the equations: 1000t= -4000 + 2000t + (1/2)at^2 1000=2000 + at Answered by Penny Nom.
	A palindrome question		2004-09-28
		From Lilly: 12, 21, 13, and 31 are the only double-digit numbers whose squares are the palindromes of the squares of the palindromes of double-digit numbers. I was wondering why it works for these numbers, and if only these numbers work this way. Answered by Chris Fisher and Penny Nom.
	1 + 1 = 10		2003-09-17
		From David: could you please explain to me how 1+1=10 thanks Answered by Penny Nom.
	Two cars		2003-07-09
		From Nicole: Two cars start off at the same point on a striaght highway facing opposite directions. Each car drives 6 miles, talkes a left turn, and drives for 8 miles. How far apart are the two cars. Answered by Penny Nom.
	Can twice a square be a square?		2003-03-25
		From Mike: The other day it occurred to some students that they could think of no square number which is an integer, which can be divided into two equal square numbers which are intergers, Or put another way, no squared integer when doubled can equal another square integer. For example 5 squared plus 5 squared is 50, but 50 is not a square number. Answered by Walter Whiteley and Claude Tardif.
	Two equations in two unknowns		2003-02-06
		From Patrick: What are all ordered pairs of real numbers (x, y) for which: yx2 - 7x + 12 = 1 and x + y = 6? Answered by Penny Nom.
	Two modes		2002-12-12
		From ali: I have a math assignment to pick the mode in a set of data. 12 and 21 both appear twice in the data set. What is the mode? Answered by Penny Nom.
	Constructing a tangent to two circles		2002-11-28
		From Tom: I have two circles, different sizes a known distance from each other. We know the radii of the circles. How do I construct a line that is tangent to both circles relative to the segment that connects the centers of both circles? Answered by Chris Fisher and Penny Nom.
	The average of two averages		2002-05-22
		From RJ: in a class with 22 students, the average garde on an exam was 68%, in another class with 32 students, the average grade on the same exam was 78%, what was the overall for the two classes? round your answers to the nearest whole number. Answered by Leeanne Boehm.
	Factor completely		2002-03-07
		From Taylor: I'm supposed to completely factor this but I don't know what to do with all the variables. a3b5 - a2b5 - 12ab5. Does it have anything to do with b5 being a common factor or am I completely off? Answered by Penny Nom.
	1,4,27,____,_____46656		2002-02-21
		From Brenda: 1,4,27,____,_____46656..... please find the fourth and fifth numbers in this sequence. Answered by Penny Nom.
	Simultaneous equations		2001-12-17
		From Matthew: 4x + y = 4 2x - 3y = 5 what is x and y Answered by Penny Nom.
	Two equations in two unknowns		2001-12-04
		From Courtney: y = 3x + 2 y = 4x - 5 solve for x Answered by Penny Nom.
	2=the square root of (2 + the square root of (2 + the square root of (2 +...)))		2001-11-05
		From Cynthia: justify algebreically, that: 2=the square root of 2 + the square root of 2 + the square root of 2 + the square root of 2 + the square root of 2 + and so on, ....... Answered by Penny Nom.
	Squares of one digit numbers		2001-10-15
		From Needa: What two two-digit numbers are each equal to their right-most digit squared? Answered by Penny Nom.
	What are the two numbers?		2001-09-24
		From A student: What are the two numbers. the sum of two numbers is 15. 6 times the smaller number is 4 times the larger number .find the two numbers. the sum of the two numbers is 28. 2 times the larger number is 5 times the smaller number minus 7. find the two numbers. Answered by Claude Tardif.
	Rolling two dice		2001-09-10
		From Owen: This probability question has been bugging me for a while. Two ordinary dice are rolled. If it is known that one shows a 5, what is the probability that they total 8? I have two different but (seemingly) correct solutions. Answered by Andrei Volodin.
	Generating uniquie 2 digit numbers		2001-07-16
		From Anthony: What methodology can I use to generate uniquie 2 digit numbers from unique 7 digit numbers. Of'course the total number of 7-digit numbers is not greater than 99. Answered by Penny Nom.
	Some irrational numbers		2001-07-03
		From Kellie: Is it possible to write pi as a fraction? Is it possible to write the square root of 2 as a fraction.. Explain why? Answered by Harley Weston.
	Two jugs		2001-06-04
		From Heather: One goes to a source of water with two jugs and only two jugs. One jug had a capacity of exactly three pints and the other five pints. Both jugs are opaque (you canít see inside them) and irregularly shaped. How can you use the two jugs and only the two jugs to measure exactly four pints of water? Answered by Harley Weston.
	Two boats		2001-04-19
		From Pat: Two boats head directly toward each other, one of them traveling 12 miles per hour and the other traveling 17 miles per hour. They begin at a distance of 20 miles from each other. How far apart are they one minute before they collide? Answered by Penny Nom.
	Two ferry boats		2001-03-25
		From Gil: Two ferry boats leave from opposite shores. One is faster than the other. They meet 720 yards from the nearest shore. They proceed to destination and upon returning they meet 400 yards from the other shore. What is the exact width of the river. Answered by Penny Nom.
	Solve for two variables		2001-02-25
		From A student: How do I solve for %1 and %2 in the following formula when T1, T2 and T3 are known? %1 and %2 are ratios of the same element, therefore %1 + %2 = 100% (%1 x T1) + (%2 x T2) = T3 Answered by Penny Nom.
	Find the two numbers		2001-02-21
		From A grade 6 student: Find the two numbers: 5 is a common factor; 100 is a common multiple; neither number is a mulitple of the other; both are even. Answered by Penny Nom.
	Networks of satellites and linear spaces		2000-12-08
		From David: Let us suppose some companies have collaborated to place several satellites in orbit. Let us call the set of all satellites that a given company helped place in orbit a network. Finally let us assume the following 4 rules. There are at least two distinct satellites. For each pair of satellites there is exactly one network containing them. Each network contains at least two distinct satellites. For each network, there is a satellite not in it. What is the least number of satellites. what is the least number of networks? Answered by Penny Nom.
	Paying with silver		2000-04-26
		From Luther Jackson: A silver prospector is unable to pay his March rent in advance. He owned a bar of pure silver, 31 inches long, so he made the following arrangement with his landlady. He would cut the bar, he said into smaller pieces. On the first day of March he would give her and inch of the bar, and on each succeeding day he would add another inch to her amount of silver. She would keep this silver as security. At the end of the month, when the prospector expected to be able to pay his rent in full, she would return the pieces to him. . . . Answered by Claude Tardif and Penny Nom.
	Is a sheet of paper 2-dimensional?		2000-03-06
		From Jaclyn Evans: One day, we were discussing 3-dimensional items. Is a sheet of paper considered a 3-dimensional shape? Or is it 2-dimensional as described by 8.5 by 11 size? Also, could you give me an example of a 4-dimensional item or scenario? Answered by Harley Weston.
	Angle of Intersection of Two Lines		2000-03-02
		From Veronica Patterson: I am having a real hard time trying to figure out this problem. Could you please help me! The homework question says to find the acute angle of intersection between the two lines y=3x+1 and y=(1/2)x-1. (It also says to use the results of a problem I had already figured out.) That problem was to use information from a picture shown that tan(theta sub1-theta sub2)= ((m sub2- m sub1)/(1+(m sub1 * m sub2))). I used the difference identity of tangent to figure out the answer. Any help on this problem would be greatly appreciated. Answered by Harley Weston.
	Two candles		1999-11-24
		From Skip Simpson: You have two candles the same length. They are lit at the same time. One burns down in 4 hours; the other in 5 hours. How long does it take before one candle is three times the length of the other candle? Answered by Walter Whiteley.
	Two Jugs		1999-09-14
		From Kynadi Kemp: If you have and 8 liter and a 3 liter jug and you want exactly 4 liters how do you get it if there is a water hose near by but thats all you have to get the 4 liters how do you do it ????? Answered by Penny Nom.
	Y2K?		1999-09-03
		From Mike Putzakulish: In Y2K, the "K" stands for thousand, but where did the "K" come from? I know it's not a Roman Numeral, but what is it?? Answered by Chris Fisher and Harley Weston.
	The square root of two is never supposed to end		1999-03-06
		From a wondering student: i am algebra II and am in the 9th grade. today we were talking about rational and irrational numbers. When we were talking about square roots my friend and i were talking and we thought of something. if you have a square with sides of length one then the diagonal of the square is the square root of 2. Now the square root of two is never supposed to end. But the diagonal of the square ends so therefore doesn't the square root of 2 end. our math teacher did not really answer our question because it was not in the lesson plan and not to many people would see where we were coming from. the answer is really bugging me and i would like to have your input. Answered by Jack LeSage and Penny Nom.
	What is the variance of the difference of two binomials?		1996-02-08
		From Chris Johnson: My co-workers and I have come up with different estimates of the z-statistic, and are in particular disagreement over the calculation of Variance for this problem. I am trying to find out, with a five percent level of significance, whether the new form yields a higher rate of return than the old form. Any thoughts, comments, or solutions? Answered by Harley Weston.

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