Question

Boris received a $20.50 gift card for a photo center. He used it to buy prints that cost 6 cents each. The remaining balance, B

(in dollars), on the card after buying x prints is given by the following function.
B(x)=20.50-0.06.x
What is the remaining balance on the card if Boris bought 15 prints?

Answer 1

$19.6

Explanation:

B=20.50-0.06.x

B=20.50-0.06*15

B=20.50-0.9

B=19.6