Keiko received a $15.50 gift card for a photo center. She used it to buy prints that cost 5 cents each. The remaining balance, B (in dollars), on the card after buying x prints is given by the following function. $B(x) = 15.50 - 0.05x$ What is the remaining balance on the card if Keiko bought 30 prints?
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50 - 0.07x. B(30) = 15.50 - 0.07(30) B(30) = 15.50 - 2.10 B(30) = 13.40 Show more…
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