## Algebra 1: Common Core (15th Edition)

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