The area of a rectangle is

77 yd2
, and the length of the rectangle is
10 yd
less than three times the width. Find the dimensions of the rectangle.

1 answer

L = 3W - 10

LW = (3W-10)W = 3W^2 - 10W = 77

3W^2 - 10W - 77 = 0

Solve quadratic equation for W, then L.