Mathematics, 13.01.2020 03:31 2xLaFlare

An online media service offers video and music downloads. each download of a song costs $1. each download of a video cost 3 times as much as the song download. you have a credit of $90. how many songs can you purchase after buying 15 videos?

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An online media service offers video and music downloads. each download of a song costs $1. each dow...