Question

the area of a rectangular wall of barn is 160 square feet. its length is 4 feet longer than twice its width. find the width of the wall of the barn

Answer 1

(4ft+2w)w =160

(2w+4)(w)=160
2w^2+4w=160
\[2w^2+4w-160=0\]
then factor to get : 2(w-8)(w+10)=0
set each equal to 0: w-8=0 w+10=0
w=8 w=-10
cant be negative so w=8ft

Answer 2

so than you need just substitute in formule the value of width what is 8 and check it than will get for result of area 160

ok ?

Answer 3

4 feet longer than twice its width - so than you know that the width is 8 than how many will be the length of ... ?

Answer 4

twice its width mean 2*8=16

so 4 feet longer than 16 = 16+4 =20

so than the length will be 20 and the width equal 8

ok ?

Answer 5

yes whatever w is you substitute 8 in for that
for the length it would be 2(8)+4= 20
20*8=160. so ya you are right

Answer 6

yes hope you understand it sure right

good luck

bye