Question 1001866
The permitter of a rectangular concrete slab is 72 feet and its area is 308 square feet. What is the length of the longer side of the slab?
let x=length
let y=width
2x+2y=perimeter=72
xy=308=area=308
y=308/x
2x+2(308/x=72
lcd:x
2x^2+616=72x
2x^2-72x+616
x^2-36x+308=0
(x-22)(x-14)
x=14 or 22
What is the length of the longer side of the slab? 22 ft