Ben orders a case of his favorite macaroni and cheese. The case contains 18 same-
size boxes that weigh a total of 7.2 pounds. Which set of equations represents the weight, in
pounds, of each box of macaroni and cheese, z?
187 = 7.2
2 = 2.5
7.2.2 = 18
2. = 2.5
18x = 7.2
= 0.4
7.2.r = 18
2 = 0.4