A music app charges 2$ to download the app plus 1.29$ per song download. Write and solve linear equa

Discussion in 'Calculator Requests' started by math_celebrity, Jan 8, 2021.

  1. math_celebrity

    math_celebrity Administrator Staff Member

    A music app charges 2$ to download the app plus 1.29$ per song download. Write and solve linear equation and a linear equation to find the total cost to download 30 songs

    Set up the equation C(d) where d is the number of downloads:
    C(d) = cost per download * d + download fee

    Plugging in our numbers, we get:
    C(d) = 1.29d + 2

    The problem asks for C(30):
    C(30) = 1.29(30) + 2
    C(30) = 38.7 + 2
    C(30) = 40.70
     

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