What is the volume of the figure below, in cubic centimeters?

756
936
1008
1080

How do you use the additive inverse to evaluate an expression that uses subtraction in a full sentence

Problem melissa is her dad build a walkway in their backyard. the walkway will be 54 feet long and 1.5 feet wide. the local hardware store sells tiles which are 1.5 by 1.5 feet and come in boxes of 12. how many boxes of tiles do they need?

Does anyone know how to do geometryme with this problem