The total cost for 9 bracelets, including shipping was $72. The shipping charge was $9. Define your

Discussion in 'Calculator Requests' started by math_celebrity, Mar 3, 2019.

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  1. math_celebrity

    math_celebrity Administrator Staff Member

    The total cost for 9 bracelets, including shipping was $72. The shipping charge was $9. Define your variable and write an equation that models the cost of each bracelet.

    We set up a cost function as fixed cost plus total cost. Fixed cost is the shipping charge of $9. So we have the following cost function where n is the cost of the bracelets:

    C(b) = nb + 9

    We are given C(9) = 72 and b = 9
    9n + 9 = 72

    Run this through our equation calculator, and we get n = 7.
     

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