#### Answer

Arithmetic sequence
$d=-3$

#### Work Step by Step

$-7-\left( -4\right) =\left( -4\right) -\left( -1\right) =\left( -1\right) -2=2-5=-3\Rightarrow d=-3$
Then this is arithmetic sequence

Published by
Pearson

ISBN 10:
013421742X

ISBN 13:
978-0-13421-742-0

Arithmetic sequence
$d=-3$

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.