Answer
See below
Work Step by Step
Graph $y=\frac{5}{9}(x-32)$ for $C=\frac{5}{9}(F-32)$
Graph $y=\frac{9}{5}x+32$ for $C=\frac{9}{5}C+32$
They are equal at $-40$.
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 6 Rational Exponents and Radical Functions - 6.4 Use Inverse Functions - 6.4 Exercises - Problem Solving - Page 444: 48c
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