Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 1 - Some Basic Concepts of Arithmetic and Algebra - 1.1 - Numerical and Algebraic Expressions - Problem Set 1.1: 42

Answer

$145$

Work Step by Step

We plug in the values for the variables that are given in the problem: $9xy - 4xz + 3yz$ $= 9(7)(3) - 4(7)(2) + 3(3)(2)$ $= 9(21) - 4(14) + 3(6)$ $= 189 - 56 + 12$ $= 133 + 12$ $= 145$
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