Question

the area of a rectangular wall of a barn is 36 square feet. Its length is 6 feet longer than twice its width. Find the length and width of the wall of the barn.

Answer 1

area=lw
l=6+2w
substitute
(6+2w)*w=36
6w+2w^2=36
2w^2+6w-36=0
2(w^2+3w-18)=0
2(w+6)(w-3)=0
w=3 or w=-6
width cannot be negative thus it must be 3
if the width is 3 then 36=3l
36/3=l
12=l

Answer 2

good?

Answer 3

yes thanks

Answer 4

np