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12-09-2020
Mathematics

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A car rental company charges $31 per day to rent a particular type of car, and $0.19 per mile. Juan is charged $59.31 for a one-day rental. How many miles did he drive? (Show your algebraic work)

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12-09-2020

x = # of miles

$59.31 = $31 + $0.19x

Subtract $31 from both sides

$28.31 = $0.19x

Divide both sides by $0.19

149 = x

Juan drove 149 miles

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The function of f(x) varies directly with x, and f(x)=48 when x=8. Evaluate f(x) when x=2