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15 March, 12:52

A repair company's charge for repairing a certain type of copy machine fits the model y = 47.38 + 0.617x where y is the number of dollars charged and x is the number of minutes the repair person is on the job. How many minutes would it take for the cost of repair to reach $70?

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  1. 15 March, 16:40
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    Answer: 36.66min

    Step-by-step explanation:

    y = 47.38 + 0.617x

    where y is the number of dollars

    x is the number of minutes on the job

    Given a value of y = $70, then

    We substitute y = $70 in the equation.

    70 = 47.38 + 0.617x

    22.62 = 0.617x

    X = 22.62/0.617 = 36.66min
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