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31 October, 10:21

A plumber charges $70 per hour $40 for the call. What does he charge for 4 hours of work Use x to represent the hours of work

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  1. 31 October, 10:34
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    F (x) = 70x+40

    f (4) = 280+40

    f (4) = 320

    He will make $320 in 4 hours.
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