#### Answer

-20

#### Work Step by Step

When a negative is subtracted by a positive, the answer becomes more negative. Thus, it follows:
$-13-7=-20$

Published by
Prentice Hall

ISBN 10:
0133281140

ISBN 13:
978-0-13328-114-9

-20

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.