Answer
$110$
Work Step by Step
Given arithmetic sequence with $a_1=-43, d=12$, we have $a_{10}=a_1+(10-1)12=65$ and $S_{10}=\frac{10}{2}(a_1+a_{10})=\frac{10}{2}(-43+65)=110$
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
013421742X
ISBN 13:
978-0-13421-742-0
Chapter 11 - Further Topics in Algebra - Test - Page 1085: 6
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