Step-by-step explanation:
this is the answer key for that question and etc...
8ft is the dstance between them.
5+3 = 8
Present area = 120 * 80 = 9600 ft^2 so the new area will be 9600 + 4400 = 14000
So if increase in length = x we have
(x + 120)(x + 80) = 14,000
x^2 + 200x + 9600 - 14000 = 0
x^2 + 200x - 4400 = 0
x = 20 feet answer
8x-5=19
+5 on each side
8x=24
Divide by 8 on each side.
X=3
