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25 January, 06:59

An electrician charges his customers an hourly rate plus a service fee of $30. The table shows the amount of money the electrician earned from his last four customers. What equation represents a customers charge, C, for x hours of service

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  1. 25 January, 09:43
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    OK, so first to find the cost per hour, we need to take the first listing on the table, 3 hours for $94.50. First, since there is a service fee of $30, subtract that. $94.50 - $30 = $64.50

    Now this is the cost for 3 hours. So let's divide that to find out the cost per hour: $64.50/3 = $21.50

    In this case, we now know that it cost $21.50 times x hours plus $30 for any customer. So the equation is C = 21.50x + 30
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