Posted by Lily on Wednesday, June 11, 2008 at 8:48pm.
Find the missing length, when the perimeter is 9x+11.
They give me 2 lengths:
2x+3 and 3x+1 how could I find the missing length x?
would I add 2x+3+3x+1? and then subtract the total by 9x+11?

Pre Algebra  Reiny, Wednesday, June 11, 2008 at 9:41pm
Is your figure a triangle?
Are the three sides 2x+3, 3x+1, and x ??
If so, then
2x+3 + 3x+1 + x = 9x+11
6x  9x = 11  4
x = 7/3 ..... makes no sense
OK, try something different.
let the third side be y
then 2x+3 + 3x+1 + y = 9x+11
y = 9x5x+114
y = 4x+7

Pre Algebra  Lily, Wednesday, June 11, 2008 at 9:59pm
ohh, ok, thank you so much :)
Answer This Question
Related Questions
 Pre Algebra  the problem is that I have to find the length of x. Here's what ...
 algebra  a and b are both the lengths of the legs of a right triangle, c is the...
 math  Find the missing length of the right triangle, Side is 20 and bottom is ...
 geometry  The perimeter of an isosceles triangle is 37 in. The lengths of the ...
 geometry  The perimeter of an isosceles triangle is 37 in. The lengths of the ...
 MathTriangles  How do I find a missing length to a triangle? The lenths I have...
 Math  Hey People!! I need the answers to these questions really bad!!! OK so ...
 Math  I'm learning about trigonometric functions, and my worksheet instructs me...
 MATHStuck  For each of the following, the Surface Area is given. Calculate the...
 Math  Fill in missing values for a rectangular prism? Length is 8. Width is ...
More Related Questions