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right triangle JKL; <JKL right; KH perp. to JL; JL=20, JH=8  TOPIC_SOLVED

JKL is a right triangle. Angle JKL is the right angle. Line KH is perpendicular to JL. If JH = 8, and JL = 20, we are told to find KH. The book gives the answer 4 x the square root of 6. When I worked out the problem, I got a different answer. Could you tell me how they arrived at this answer and dr...
by Motherof8
on Sat Feb 12, 2011 1:31 am
 
Forum: Geometry
Topic: right triangle JKL; <JKL right; KH perp. to JL; JL=20, JH=8
Replies: 3
Views: 3635

Re: right triangle JKL; <JKL right; KH perp. to JL; JL=20, J  TOPIC_SOLVED

I drew a triangle where J was the right angle, K was the angle across from it, and L was the angle at the top. Line KH is drawn from angle K to the middle of line JL. JH is obviously a leg of another right angle,and JL is the side opposite the hypotenuse. JH would be the hypotenuse of the smaller ri...
by Motherof8
on Sun Feb 13, 2011 8:08 pm
 
Forum: Geometry
Topic: right triangle JKL; <JKL right; KH perp. to JL; JL=20, JH=8
Replies: 3
Views: 3635

Unable to get right answer  TOPIC_SOLVED

This is a geometry problem, but I had to use Algebra too. The book states the problem this way: In right triangle JKL, angle JKL is the right angle, and KH is perpendicular to JL. If KH = 12, and HL = 40, we are told to find JK, and to assume that JK is the shorter leg of right triangle JKL. I drew ...
by Motherof8
on Wed Feb 23, 2011 3:12 am
 
Forum: Geometry
Topic: Unable to get right answer
Replies: 1
Views: 2538

the denominator of a fraction exceeds its numerator by 5...  TOPIC_SOLVED

THe denominator of a fraction exceeds its numerator by 5. If the numerator is decreased by 3 and the denominator increased by 1, the resulting fraction is equal to 2/5. What was the original fraction? THe answer in the book is 9/14. I worked it out plugging this answer in and it checks out, but how ...
by Motherof8
on Tue Mar 22, 2011 6:00 pm
 
Forum: Beginning Algebra
Topic: the denominator of a fraction exceeds its numerator by 5...
Replies: 2
Views: 1637

How to solve a stated problem  TOPIC_SOLVED

THe area of a rectangle is 144 ft. It is 7 feet longer than it is wide. What is the width of the rectangle? I know that the area of a rectangle = length x width. I said the width was x and the length was x + 7. I wrote this equation: x(x + 7) = 144. x squared + 7x - 144 = 0. How do you work this qua...
by Motherof8
on Thu Apr 07, 2011 7:08 pm
 
Forum: Beginning Algebra
Topic: How to solve a stated problem
Replies: 1
Views: 1052

practical applications  TOPIC_SOLVED

I am curious about how one would apply the knowledge of the area of a figure in everyday life. I know it is helpful to know the perimeter if one wants to paint a house, but how would you apply knowledge of the area of a polygon?
by Motherof8
on Sun Apr 10, 2011 6:19 pm
 
Forum: Geometry
Topic: practical applications
Replies: 1
Views: 2262

square root of 29,929?  TOPIC_SOLVED

Could anyone tell me the square root of 29,929? I can't seem to find it.
by Motherof8
on Tue Apr 12, 2011 6:32 pm
 
Forum: Beginning Algebra
Topic: square root of 29,929?
Replies: 9
Views: 2707

Re: square root of 29,929?  TOPIC_SOLVED

I don't want to use a calculator, I want to figure it out myself. There's another problem I can't seem to solve. THe square root of 67,081. I tried using 809, because 8 squared is 64 and 9 squared is 81, but it didn't work. One book said I could figure out the square root of a number by estimating t...
by Motherof8
on Thu Apr 14, 2011 1:09 am
 
Forum: Beginning Algebra
Topic: square root of 29,929?
Replies: 9
Views: 2707

quadratic equation: sum is 20; sum of squares is 202  TOPIC_SOLVED

The sum of 2 numbers is 20 and the sum of their squares is 202. Find the numbers. I can't seem to find any numbers that add up to 20 whose squared add up to 202. I've tried all the numbers but they all come out as more than 202. I've even tied some negative numbers and whole numbers with fractions. ...
by Motherof8
on Sun Apr 17, 2011 5:43 pm
 
Forum: Beginning Algebra
Topic: quadratic equation: sum is 20; sum of squares is 202
Replies: 8
Views: 2881

Re: quadratic equation: sum is 20; sum of squares is 202  TOPIC_SOLVED

I guess the equation would be x +y -20=0 and x squared + Y squared -202 = 0. I didn't know exactly how to solve an equation with regular variables and those that are squared, so I just plugged in certain values for the variables to see if they worked. 10 + 10 =20. 100 + 100 = 200, not 202. 4x 4 = 16...
by Motherof8
on Tue Apr 19, 2011 3:57 pm
 
Forum: Beginning Algebra
Topic: quadratic equation: sum is 20; sum of squares is 202
Replies: 8
Views: 2881
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