Answer:
4 and 4.1
Step-by-step explanation:
because sqrrt17 is about 4.123 (memmorized) and it's rounded down to 4 and down to 4.1
A. y=-1.5x+30
B. it's negative because he is using money on the card
C.20, because that is the maximum amount of washes you can get for 30
