Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson
ISBN 10: 0-32184-874-8
ISBN 13: 978-0-32184-874-1

Chapter 4 - Polynomials - 4.7 Polynomials in Several Variables - 4.7 Exercise Set: 90

Answer

$5y+21$

Work Step by Step

The given expression, $ 4(y+7)-(y-2)+(2y-9) ,$ simplifies to \begin{array}{l}\require{cancel} 4(y+7)-y+2+2y-9 \\\\= 4(y)+4(7)-y+2+2y-9 \\\\= 4y+28-y+2+2y-9 \\\\= (4y-y+2y)+(28+2-9) \\\\= 5y+21 .\end{array}
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