Beth borrows $100 from her grandmother. She plans to pay her grandmother $15 a month until the money is paid back. Which equation can be used to determine how much Beth will owe, y , after 5 months? y=100−5(15) y is equal to 100 minus 5 times 15 y=5(100)−15 y is equal to 5 times 100 minus 15 y=15(100)−5 y is equal to 15 times 100 minus 5 y=100−5−15