Answer
$-6$.
Work Step by Step
The given expression is
$=15x+9$
Substitute $-1$ for $x$.
$=15(-1)+9$
Multiply.
$=-15+9$
Subtract.
$=-6$.
Big Ideas Math - Algebra 1, A Common Core Curriculum
by Larson, Ron; Boswell, Laurie
Published by
Big Ideas Learning LLC
ISBN 10:
978-1-60840-838-2
ISBN 13:
978-1-60840-838-2
Chapter 3 - Graphing Linear Functions - Maintaining Mathematical Proficiency - Page 101: 12
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