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Explications |
2000-03-05 |
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From Jean Barbe:
Comment expliquer l'algèbre à un adolescent du Sec. 111
Answered by Claude Tardif. |
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Two calculus problems |
2000-03-03 |
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From Tara Doucet:
The height of a cylinder with a radius of 4 cm is increasing at rate of 2 cm per minute. Find the rate of change of the volume of the cylinder with respect to time when the height is 10 cm. A 24 cm piece of string is cut in two pieces. One piece is used to form a circle and the other to form a square. How should the string be cut so the sum of the areas is a maximum?
Answered by Harley Weston. |
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Angle of Intersection of Two Lines |
2000-03-02 |
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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. |
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Triangular numbers and square numbers |
2000-03-02 |
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From Emily McCallum:
Would someone find me some math activities using triangular numbers and square number. Especially acitivities that actually form the shapes. They need to be at the 5th grade or 6th grade level. But you can not find anything that can be tauht at these level, that fine. I just need to be able to teach this new subject or kind of math to my kids.
Answered by Rick Seaman and Penny Nom. |
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The positive effects of mathematics on human's thought |
2000-03-02 |
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From Yucel Tucker :
I am a student of secondary school. I have to prepare a homework about " the positive effects of mathematics on human's thought". If you help me I'll be pleased. thank you...
Answered by Walter Whiteley. |
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Pythagorean triples |
2000-03-01 |
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From Bob Ross :
Could you please tell me what pythagoria triad is.I am a year 10 student.
Answered by Chris Fisher. |
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Proportionality in a triangle |
2000-03-01 |
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From Courtney Smith:
I would appreciate assistance with the following problem In triangle ABC,segment MN divides sides(segment)AC and (segment)AB proportionally. If the coordinates are A(3,7),M(0,10) and N(8,22) and if AM:MC = 3:1, find the coordinates of B and C.
Answered by Penny Nom. |
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Saving for college |
2000-03-01 |
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From Andrew Kunz:
SAVING FOR COLLEGE In this project, you will forecast a friend's finances. Jane has received $75 from her grandparents on every birthday since she was one year old. She has been saving the money in an account that pays 5% interest. She is saving her money to help you pay for her college education, which she will start this fall after her 18th birthday. She also has been receiving birthday checks from her other relatives, but these didn't start until she was 12 years old. The amounts of these checks from her 12th birthday until her 18th birthday are $45, $45, $55, $50, $55, $60, $65. How much money will she have saved just from her birthdays by the time she starts college? IS this a reasonable amount to pay for a used car during her junior year in college? If she had invested her money in a different accoutn that had earned 7% interest, how much more money would she have saved?
Answered by Penny Nom. |
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Folding a page |
2000-03-01 |
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From Krista Bischoff:
One corner of a page of width a is folded over and just reaches the opposite side. Express L, the length of the crease, in terms of x and a. I can't get the picture to copy to this form so I guess I will have to try and describe the picture the best that I can. The top right hand corner is folded to the left side, almost half way down. The width of the paper is a ( the width of the bottom part which is not folded.) The creased side is L and the part shorter part of the folded area is x (the part that would have been the top right of the original piece.)
Answered by Chris Fisher. |
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What's the next term? |
2000-02-29 |
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From Meredith O'Neill:
At this point, the whole family wants to know the answer. if possible an explanation. thanks
a sequence ? 16,37,58,89,145 ??
Answered by Chris Fisher. |
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Area of a circle |
2000-02-29 |
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From Michelle Buboltz:
My name is michelle and I just need to convert 25 ft across a circle into how many square feet.
Answered by Penny Nom. |
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A negative times a negative |
2000-02-29 |
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From Michael J. Butler :
I have reviewed the answer in relation to the question of why (-3)x(-2)=6; however, I am still not able to properly explain the reasoning to my son, Jonathan, who is in grade 7. I want him to understand the reason for the rule that the multiplication or division of two negative numbers equals a positive number. Can you help?
Answered by Chris Fisher. |
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Order of operations |
2000-02-27 |
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From Mildred Saulsbery:
Find the value of the expression. 6(5+1) - 9(1+1) _____________ 5(8 - 6) -23
Answered by Harley Weston. |
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Fractions in algebra |
2000-02-27 |
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From Leslie:
Question:
add (4x+1)/(x-8) + (3x+2)/(x+4) + (49x+4)/(x^2-4x-32) and
solve x - 6/(x-3) = 2x(x-3)
Answered by Penny Nom. |
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Factoring, primes, GCF and LCM |
2000-02-27 |
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From Ruth Kroek:
My son is in grade seven, he has to do a Factoring Booklet the areas covered are: - Prime #'s
- Composite #'s
- Rainbow Factoring
- Finding Multiples (consecutive multiples)
- Finding GCF of 2-3 numbers uning Rainbow factoring
- Finding LCM of 2 numbers using consecutive multiples
- prime factor trees
- prime factor ladders
- finding GCF of 2 numbers using Prime number Method
Although his text 'Math Power' gives some information, we are at a loss ..
Answered by Penny Nom. |
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