Question

Roy already has 10,368 frequent flyer miles, and he will earn 2,832 more miles from his round-trip flight to New York City. In addition, he earns 2 frequent flyer miles for each dollar he charges on his credit card. How many dollars will Roy need to charge on his credit card to have a total of 15,000 frequent flyer miles? Explain and determined your answer.

Answer 1

find his total number of miles: 10,368 + 2,832 = 13,200

subtract from 15000 to see how many more he needs: 15,000 - 13,200 = 1,800

divide by 2 to find the number of dollars: 1800/2 = 900

he'll need to charge $900 to get 15,000 miles.