posted by darlena .
the length of a rectangular garden is 8 feet longer than the width. The garden is surrounded by a 4-foot sidewalk. the sidewalk has an area of 320 square feet. find the dimensions of the garden.
the garden is w by w+8, so the sidewalk has area
2(4w+4(w+8))+4*4^2 = 320
w = 12
The garden is 12x20