Wednesday

July 30, 2014

July 30, 2014

Posted by **Russell** on Sunday, July 18, 2010 at 7:16pm.

- Algebra -
**Henry**, Sunday, July 18, 2010 at 7:46pmh = x feet. B = 2X - 4.

A = Bh/2 = (2X -4)X/2 = 15.

Cross multiply:

2X^2 -4X = 30, X^2 -2X -15 = 0,

Solve for X BY FACTORING:

(X -5) (X + 3) = 0

X - 5 = 0, X = 5; X + 3 = 0, X = -3

Choose positive value: X = 5 = height.

2X -4 = 10 -4 = 6 = Base.

**Related Questions**

honors algebra - the area of a triangle is 105 square feet. the height is two ...

algebra 2 - a triangluar garden has an area of 189 square feet. its height os 3 ...

HELP!!! Math - The volume of a pyramid varies jointly as its height and the area...

geometry - The area of a triangular garden can be no more than 120 feet square ...

Math - The area of a rectangle is 128 square feet. Its height is twice its base...

geometry - If the height of a triangle is one inch more than twice its base, and...

college - the area A of a triangle is calculated as A= 1/2 hB. If the height h ...

Algebra - A roof truss is in the shape of a triangle with height of x feet and a...

math - i have trouble finding the answer to this and how to srt. there is a ...

Algebra - the area of a triangle can be determined by using the formula A= 1/2bh...