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 - Page 7: 57



Work Step by Step

We start with the equation for area of a triangle: $A=\frac{bh}{2}$ We plug in the values for base and height: $A=\frac{7\times6}{2}$ To simplify, we follow the order of operations. First, we multiply above the fraction bar: $A=\frac{42}{2}$ Then, we divide: $A=21$
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