the area of a rectangle is 52 in². the length of the rectangle is 9 in. longer than the width. what is the width of the rectangle? 8 in. 6 in. 4 in. 3 in.
Answers
Answer 1
Answer:
length, l = width, w + 9 l = w + 9
area = length * width 52 = l * w 52 = (w+9) w 52 = w^2 + 9w w^2 + 9w - 52 = 0 w^2 + 13w - 4w - 52 = 0 w (w + 13) - 4 (w + 13) = 0 (w + 13) (w - 4) = 0