# Chapter 1 - Introduction to Algebraic Expressions - 1.4 Positive and Negative Real Numbers - 1.4 Exercise Set - Page 35: 13

$[-80, 100]$

#### Work Step by Step

The high temperature is 100°F. Since it was 100° above zero, the value is $100$. However, since the low temperature is -80°F, 80° below zero, the value is $-80$.

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