Question

The length of a picture frame is 7 inches more than the width. For what values of x is the perimeter of the picture frame greater than 154 inches?

Answer 1

p=2(L+W)
l=x+7
w=x
P=2(x+7+x)
P=2(2x+7)
P=4x+14

hast to be greater than 154

P>154
4x+14>154
minus 14 both sides
4x>140
divide 4
x>35