The length of a rectangle is 10yd less than three times the width, and the area of the rectangle is 77 yd sq . Find the dimensions of the rectangle.
w = width . ... length = 3w - 10
A = Lw
77 = (3w - 10)w
3x^2 -10w -77 = 0
(3w + 11)(w - 7) = 0
w = 7 or (w = -11/3 ... not possible)
L = 11
