Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 2 - Solving Equations - 2-5 Literal Equations and Formulas - Practice and Problem-Solving Exercises - Page 113: 43


-108.4 Fahrenheit

Work Step by Step

In order to complete this problem we must use the equation: C=$\frac{5}{9}$(F-32) to convert from Celsius to Fahrenheit. Since the question tells us that the Celsius temperature in this problem is -78, we must plug that into our equation for C to get our answer. When we plug in -78 for C our equation looks like this: -78=$\frac{5}{9}$(F-32) The next step is to multiply both sides by $\frac{9}{5}$ to cancel out the $\frac{5}{9}$ on the right side of the equation, resulting in our new equation: -140.4=F-32 Lastly, add 32 to both sides to get the answer: F=-108.4
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