Answer
140
Work Step by Step
$\sum ^{10}_{j=1}\left( 2j+3\right) =2\sum ^{10}_{j=1}j+\sum ^{10}_{j=1}3=2\times \dfrac {n\times \left( n+1\right) }{2}+3\times n=2\times \dfrac {10\times 11}{2}+3\times 10=140$
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 - 11.2 Arithmetic Sequences and Series - 11.2 Exercises - Page 1026: 69
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