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18 June, 23:05

A new video game is expected to sell 120 copies the first hour at a local game store. After that, the sales will follow the function s (x) = 15 (x - 1) where x is the number of hours. What is the function that shows total sales, including the first hour?

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  1. 19 June, 01:44
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    The first hour, they sell 102 copies.

    So the function starts with : s (x) = 102 + (I put a + after 102 because we know that there are following sales after the first hour).

    Then, the sales are s (x) = 11 (x-1).

    So this is the second part of your function.

    Answer: 102 + 11 (x-1)
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