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

Discussion in 'Calculator Requests' started by math_celebrity, Nov 15, 2020.

  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 a linear equation to find the total cost to download 30 songs

    Set up the cost function C(s) where s is the number of songs:
    C(s) = cost per song * s + download fee

    Plugging in our numbers for s = 30 and a download fee of $2 and s = 1.29, we have:
    C(30) = 1.29(30) + 2
    C(30) = 38.7 + 2
    C(30) = 40.7
     

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