18 items are filed under this topic.
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Two quadratic equations |
2014-11-20 |
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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. |
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Two quadratic equations |
2012-11-22 |
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From fahmie:
graph and solve the intersection of the following equations:
x^2+y^2=4
x^2+2y=4
Answered by Penny Nom. |
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A picture with a frame |
2011-08-19 |
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From Aniish:
A picture 8inches by 12inches is placed in a frame of uniform width. If the area of the frame equals the area of the picture find the width of the frame?
Answered by Penny Nom. |
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A piece of string 8 inches long is cut in two pieces |
2010-02-02 |
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From Susan:
If you have a piece of string 8 inches long and cut it in two pieces. Then take the pieces and forms
each into a square such that the area of each squares added together equals 2. How long are the
sides of the squares?
Susan
Answered by Penny Nom. |
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Quadratic equations |
2009-08-30 |
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From jovian:
how can i find the quadratic equation of the roots 2/5 and -1/3?
Answered by Stephen La Rocque. |
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Quadratic equations arising from practical problems |
2008-11-24 |
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From Lenval:
Why do quadratic equations arising from practical problems often give physically impossible solutions such as negative distances, negative times or, say, a polygon with a negative number of sides? For example: "A river in flood carries a tree t-squared - 23t metres downstream in t seconds. How long does it take for the tree to be carried 50 metres downstream?" This gives t=25 and t=-2. Please explain the second 'solution', which is not physically possible.
Answered by Chris Fisher and Victoria West. |
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3y^2 - 48 = 0 |
2008-06-23 |
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From marquis:
3y^2 - 48 = 0
Answered by Stephen La Rocque. |
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Problems solved using quadratic equations |
2007-10-07 |
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From Lisa:
a. Two positive numbers differ by 5. Their product is 234. What are the two numbers?
b. The sum of two numbers is 12. Their product is 30. What are the two numbers?
c.Two numbers differ by 5. Their squares differ by 55. What are the two numbers?
d. The sum of two numbers is 15. Their product is 56. By forming an equation, find the two numbers.
Answered by Penny Nom. |
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Fencing a field |
2007-02-01 |
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From Carol:
"The area of a rectangular field is 1200m^2. Two parallel sides are fenced with aluminum at $20/m. The remaining two sides are fenced with steel at $10/m. The total cost of the fencing is $2200." What is the length of each side fenced with aluminum and steel?
Answered by Stephen La Rocque. |
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Solving some quadratic equations |
2004-07-15 |
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From A student:
Could you please solve the following for x
x2+6=5x
x2+16=8x
2x+21=3x2
Answered by Penny Nom. |
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The product of the page numbers |
2003-11-07 |
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From Morgan and Mom:
You open a book and the product of the page numbers is 12,656. What are your page numbers?
Answered by Penny Nom. |
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Quadratic equations |
2002-12-10 |
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From Katie:
just bugging the hell outta me and I cannot figure it out for the life of me.
1)x-2x-1 =0
Find both roots. You must simplify both of your roots. This equation requires the use of the Quadratic Formula. I have tried everything for this and I am still either getting the wrong answers, and end up getting really frustrated. If you could find the answers and tell me how you did it I would greatly appreciate it! Then the second problem is
2) The square of a certain negative number is equal to 70 decreased by 3 times the number. Find the answer! On this one I set it up but still came out with the wrong answer. So if you could help me on this one I would greatly appreciate it!
Answered by Penny Nom. |
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A right-angled triangle |
2001-12-13 |
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From Pamela, Jeff, Kayleigh and Jacob:
A right-angled triangle has one side that is 8 cm shorter that the hypotenuse. The other side is 1 cm shorter than the hypotenuse. Find the length of the sides.
Answered by Penny nom. |
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Quadratic equations |
2001-03-11 |
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From Philip:
I am a student in the UK and i am in secondary school and i am doing my GCSE next year. here are my questions: solve the following equations correct to 2 decimal each time. [1] 2xsquared + 5x = 1 [2] 3xsquared(2x+1)=1 [3] xsquared + 7x + 2 = 2x + 4 [4] 5xsquared - 3x = xsquared + 4
Answered by Penny Nom. |
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Quadratic |
2000-01-26 |
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From Karen Johnson:
What is the reasoning behind the title quadratic equation?
Answered by Penny Nom. |
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A ladder problem |
1999-04-22 |
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From Michael Blade:
There is a cube box 3feet x 3feet x 3ft resting against a vertical wall on level ground. Resting against the outside corner of the box is a ladder 10 feet tall, this ladder is of course resting on the ground but also against the outside corner of the box and rests on the wall. The question- the ladder is divided into two unequal section bounded by the box to the ground and the box to the wall. what are those dimensions?
Answered by Penny Nom. |
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Quadratic equations |
1999-03-31 |
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From Ken Niebergall:
#1 a2 - 10a = 2a - 36 #2 t(t - 5) = 5 (t - 5) #3. (x + 4)(x - 3) = 8 Thanks.
Answered by Jack LeSage and Penny Nom. |
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Find the Numbers. |
1997-12-28 |
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From Sandy C:
The sum of the squares of two numbers is 53. Twice the greater, minus the lesser is 11. Find the numbers.
Answered by Penny Nom. |
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