Mathematics, 07.07.2019 15:50 alex6toes

When going more than 38 miles per hour, the gas mileage of a certain car fits the model y = 43.81 - .395x where x is the speed of the car in miles per hour and y is the miles per gallon of gasoline. based on this model, at what speed will the car average 15 miles per gallon? (round to nearest whole number.)

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