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19-02-2018
Mathematics

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the cost of renting a recording studio is $30 for the first hour and $20 for each additional hour

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Аноним Аноним

19-02-2018

Let the number of hours be x
Assume x > 1

Total cost = 30 + 20(x -1) = 30 + 20x - 20 = 10 + 20x

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