Question

Raina received a $40 gift card for a photo center. She used it to buy prints that cost $.10 each. The remaining balance B (in dollars) on the card after buying x prints is given by the following function.B(x)=40.00-0.10xWhat is the remaining balance on the card and Raina bought 15 prints?

Answer 1

The given equation is:

$B(x)=40.00-0.10x$

Since the number of prints bought is 15, it follows that x=15.

Substitute this into the equation given:

$\begin{gathered} B(x)=40.00-0.10(15) \\ B(x)=40.00-1.50=38.5 \end{gathered}$

Hence, the remaining balance on the card is $38.5.