You are mailing a gift box that is 18 inches by 8 inches by 12 inches. You want to put it in a larger box and surround it with foam packing. The larger box is 20 inches by 12 inches by 15 inches. How many cubic inches are there for the foam packing?

10% of increase is the final answer! : )

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk

its less than 713.21 but greater than 5.2