# Chapter 9 - Basic Algebra - 9.2 Adding and Subtracting Signed Numbers - 9.2 Exercises: 76

(a) $-7^o$ F (b) $-33^o$ F

#### Work Step by Step

Use the table to find the "windchill" temperature. (a) $10^o$ F is in the 8th column while $15$ mph wind is in the 4th row of the first column. The intersection of the 4th row and the 8th column is $-7$. Thus, the "windchill" temperature is $-7^o$ F. (b) $-5^o$ F is in the 11th column while $35$ mph wind is in the 7th row of the first column. The intersection of the 7th row and the 11th column is $-33$. Thus, the "windchill" temperature is $-33^o$ F.

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