The question is basically asking you to calculate the new volume of the box that is 12x 7.5 x 2.5inches and to see if it has a larger volume than 162.5 sqin.
If you calculate the volume you should get 225 square inches.
Answer: b. false
Step-by-step explanation:
Answer: 3.7 (to nearest tenth)
Working:
7/17 = x/9
63 = 17x
x = 63/17
x = 3.7 (to nearest tenth)
The original area of a face would be a^2. Now that you added b to the edge, the new area of each face would be (a+b)^2. To find how much the are increased, subtract a^2 from (a+b)^2. 
So the answer is b(2a+b)
...........................
