a music app charges $5 to download the app plus $1.25 per song downloaded. write linear equation to

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a music app charges $5 to download the app plus $1.25 per song downloaded. write linear equation to calculate the cost for x number of songs

With x songs, our Cost equation C(x) is:
C(x) = cost per download * x downloads + app download fee
C(x) = 1.25x + 5