Answer:
18
Step-by-step explanation:
3+9=12
12/2=6
6x3=18
Answer:
c = 20d + 15
Step-by-step explanation:
answer choices may help if the answer is not one of the choices; but here is the answer that it should be:
20 dollars per day is 20 times the length of rental.
15 is a cost that is added and does not change.
c = the total cost therefore:
c = 20d + 15
Infinite they’re all multiples, so they are the same line