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

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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