The menu of a concession stand is shown on the board below. How many different ways can Elli buy 5 items from the menu for exactly $10?


  1. Let C represent the total cost of each deal
    Let T be the number of trips down the water slide

    C = 32 for the 1st deal since the cost is the same regardless of how much she rides
    C = 18 + T for the 2nd deal

    To find when the two costs are equal set them equal to each other and solve for T

    32 = 18 + T
    T = 14 trips

    The cost must be $32 since that is the only cost possible for the 1st deal


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