Question

the length of a rectangular photograph is 7in more than width. if the area is 78in, what are the dimensions of the photograph?

Answer 1

(x+7)(x)=78

Answer 2

x^2+7x=78

Answer 3

L=length
W=width
L=W+7
LW=78
(W+7)W=78
W^2+7W-78=0
(W+13)(W-6)=0
W=-17(can't be negative) or W=6 (this is the one)
So L=6+7=13
Dimension = L times W = 13 by 6

Answer 4

thank you =]