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Mathematics, 16.10.2019 20:00 kat9940

Jimmy is selling used books at a yard sale. a customer buys 9 books at a cost of $0.75 each and pays with a $20.00 bill. jimmy must determine c, the amount of change in dollars he should give the customer. which equation represents c?
a. 20 - 0.75c = 9
b. 20 - 0.75 = 9c
c. 0.75(9) + c = 20
d. 0.75c + 9 = 20

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