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 1 - Introduction to Algebraic Expressions - Test: Chapter 1: 37

Answer

$5$

Work Step by Step

With $x=20,$ the statement, "y is $4$ less than half of $x$ results to \begin{array}{l}\require{cancel} y=\dfrac{1}{2}(20)-4 \\\\ y=10-4 \\\\ y=6 .\end{array} With $x=20$ and $y=6,$ the given expression, $ \dfrac{5y-x}{2} ,$ evaluates to \begin{array}{l}\require{cancel} \dfrac{5y-x}{2} \\\\= \dfrac{5(6)-20}{2} \\\\= \dfrac{30-20}{2} \\\\= \dfrac{10}{2} \\\\= 5 .\end{array}
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