Answer
$33$
Work Step by Step
To find the $n$th term of an arithmetic sequence, we use the formula $a_n = a_1 + (n-1)d$ where $a_1$ is the first term and $d$ is the common difference
$a_8 = 12 + (8-1)\cdot3 = 12+7\cdot3 = 12+21 = 33$
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 11 - Section 11.2 - Arithmetic and Geometric Sequences - Exercise Set - Page 646: 9
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