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30 March, 13:26

The cost, c, of a ham sandwich at a deli varies directly with the number of sandwiches, n. If c = $54 when n is 9, what is the cost of the sandwiches when n is 3? ...

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  1. 30 March, 15:11
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    We can find the cost of sandwiches with this equation:

    c = x*n, where x is the cost per sandwich and n is the number of sandwiches.

    If c = $54 when n = 9, then we can find x.

    c = x*n

    54 = 9x

    x = $6

    The cost per sandwich is $6.

    When n = 3, then c = x*n = ($6) (3) = $18

    When n is 3, the cost of the sandwiches is $18.
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