Answer
$315$
Work Step by Step
For an arithmetic series, the sum for the finite series is given by:
$S_n=\dfrac{n(a_1+a_n)}{2}$
Thus, we have
$S_{10}=\dfrac{10 \times (-9+(72))}{2}=315$
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 12 Sequences and Series - 12.2 Analyze Arithmetic Sequences and Series - 12.2 Exercises - Skill Practice - Page 807: 45
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