Answer:length=7 feet Width=5 feet
Step-by-step explanation:
Area=35
Length=L
Width=L
L+8=3 x w L=3w-8
Area=L x w
35=Lw
35=w(3w-8)
35=3w^2-8w
3w^2-8w-35=0
3w^2+7w-15w-35=0
w(3w+7)-5(3w+7)=0
(w-5)(3w+7)=0
w-5=0 3w+7=0
w=5 3w=-7 w=-7/3
We are only interested in The positive answer which is width =5 feet
substitute w=5 in 35=L X w
35=L x w
35=L x 5
L=35/5
L=7
Length =7 feet
