#### Answer

$C=3.5x$

#### Work Step by Step

If one gallon costs $3.50$, then $x$ gallons would cost $3.50\times x$, or $3.5x$ dollars.

Published by
Brooks Cole

ISBN 10:
1305115546

ISBN 13:
978-1-30511-554-5

$C=3.5x$

If one gallon costs $3.50$, then $x$ gallons would cost $3.50\times x$, or $3.5x$ dollars.

You can help us out by revising, improving and updating this answer.

Update this answerAfter you claim an answer you’ll have **24 hours** to send in a draft. An editor
will review the submission and either publish your submission or provide feedback.