Answer:
Part A: x= number of shifts he works at the theater y= number of dog-walking jobs.
Part B: The only terms are 85x and 15y.
Part C: 15y
Explanation:
Part A: The variables are the xy reasoning to this is due to them being the replacements of the numbers which aren't known.
Part B: The terms are pieces of the expression which are together.
Part C: It is the one used above for the dogs " $15 for every dog-walking job."