Answer
$-13^o$F
Work Step by Step
$F=\frac{9}{5}C+32\longrightarrow$ substitute the value for C
$=\frac{9}{5}(-25)+32\longrightarrow$multiply
$=-\frac{225}{5}+32\longrightarrow$ simplify
$=-45+32\longrightarrow$add
$=-13$
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