Answer
175
Work Step by Step
For an arithmetic series, we know the following equation:
$$S_n=n\frac{a_1+a_n}{2}$$
Thus, we find:
$$S_n=10[\frac{(1+3(1))+(1+3(10))}{2}]=175$$
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: 40
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