the area of a rectangular wall of a barn is 40 square feet. its length is 6 feet longer than the width. find the length and width of the wall of the barn.
Area = length x width A= l x w length is 6 ft longer than width, length = width + 6ft Area = (w+6) x w 40 sq ft=w^2+ 6w w^2 + 6w - 40 = 0 (w + 10) (w - 4) = 0 w = -10ft and/or 4ft
distance can't be negative, so 4ft is width, length is 10ft
