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 - 1.4 Positive and Negative Real Numbers - 1.4 Exercise Set - Page 36: 100



Work Step by Step

$\bf{\text{Solution Outline:}}$ Use the concept of inequality and absolute value to translate the given description, \begin{array}{l}\require{cancel} \text{the distance from $t$ to $0$ is at least $20$} ,\end{array} to symbols. $\bf{\text{Solution Details:}}$ The absolute value of $x$, written as $|x|,$ is the distance of $x$ from $0.$ Hence, in symbols, the given description is equivalent to \begin{array}{l}\require{cancel} |t|\ge20 .\end{array}
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