Intermediate Algebra (12th Edition)

Published by Pearson
ISBN 10: 0321969359
ISBN 13: 978-0-32196-935-4

Chapter R - Summary - Test Your Word Power - Page 40: 2


A. a symbol used to represent an unknown number

Work Step by Step

A variable is a symbol that is used to represent an unknown number. Examples of variables include $a$, $t$, and $x$. For example, we can use the variable $x$ to represent a person's unknown age in years.
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