Answer:
a. total cost including discount = 64.47
b. sales would be greater if tax was added before
Step--step explanation:
Step-by-step explanation:
ac is the answer
.............
a.) 10.0
b67
r = -1/5
5(r - 10) = -51
Distribute
5r - 50 = -51
Add 50 to each side
5r-50+50 = -51+50
5r = -1
Divide each side by 5
5r/5 = -1/5