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21 March, 12:42

Jabari is power washing houses for a summer job. For every job, he charges an initial fee plus $30 for each hour of work. His total fee for a 4-hour job, for instance, is

$170.

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Answers (2)
  1. 21 March, 13:39
    0
    The initial fee is $50.

    Step-by-step explanation:

    We will write an equation in slope-intercept form to solve this.

    We know the slope, or rate of change, is $30. This gives us

    y = 30x + b

    We do not know the y-intercept, which is the initial fee.

    We know that for a 4 hour job, he charges $170. We can substitute the total cost in for y and the number of hours in for x:

    170 = 30 (4) + b

    170 = 120 + b

    Subtract 120 from each side:

    170-120 = 120+b-120

    50 = b

    The initial fee is $50.
  2. 21 March, 13:55
    0
    So what is the question here? if he is paid $30 an hour for 4 hours that is $120 if the total fee is $170 then the initial fee for the job is $50.
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