Question

the floor of a rectangular shed is 7 ft longer than it is wide and has an area of 120 square ft. what are its dimensions?

Answer 1

Let s = width
l= length
l=(s+7)
ls=120
(s+7)s=120 solve for s

Answer 2

and then sub the value of s into l=(s+7) to find l

Answer 3

Thats the part I got stuck on. I got s^2+7s=120. I can't figure out how to get s from there

Answer 4

s^2+7s-120=0
(s+15)(s-8)=0
s=-15, s=8

Answer 5

thanks so much!

Answer 6

no problem