Thursday
March 30, 2017

Post a New Question

Posted by on .

A 13 foot ladder is leaning against a vertical wall. The distance from the top of the ladder to the bottom of the wall is 7 feet longer than the distance from the bottom of the ladder to the bottom of the wall. Find how high the top of the ladder reacher on the side of the wall.

  • Math - ,

    a= x
    b = x+7
    c = 13

    x^2 + (x+7)^2 = 13^2
    = x^2 + x^2 +7x +7x + 49 = 169
    = 2x^2 + 14x + 49 = 169
    = 2x^2 + 14x + 49 -169= 169-169
    = 2x^2 + 14x -120 = 0
    = x^2 +7x -60 = 0
    (x -5)(x+12)= 0

    x = 5
    x = -12 ignored when it is negative

    a= 5
    b = 12

Answer This Question

First Name:
School Subject:
Answer:

Related Questions

More Related Questions

Post a New Question