math
posted by greg on .
a rectangular parking lot has a length that is 10 yards greater than the width. the area of the parking lot is 200 square yards.find the length and the width

the equation you use is:
200=w(10+w)
200=10w+w^2
w^2+10w200 = 0
(w+20)(w10)= 0
w = 20 or 10
it has to be positive so the answer is 10.
The width is 10 yards and the length is 20 yards