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?

Mary had at least an 80% on her test write an inequality to represent this situation

12. the amount of money in a bank account decreased by 21.5% over the last year. if the amount of money at the beginning of the year is represented by ‘n', write 3 equivalent expressions to represent the amount of money in the bank account after the decrease?

On a piece of paper graph f(x)=5•(0.4)^x