Answer
$-45$
Work Step by Step
Since,we have $4,-3,-10,....$
$a_n=a_1+(n-1)d$
Thus, $a_n=4+(n-1)(-7)$
and
$a_8=4+(8-1)(-7)=4+7(-7)=4-49=-45$
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 11 - Section 11.1 - Sequences and Summation Notation - Exercise Set - Page 831: 100
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