Emmanuel has 745 pictures in his phone his memory is getting full so he starts deleting 20 pictures everyday if i need to be able to write an algebraic expression to describe the number of pictures of phone his phone after any given number of days

Dean and karlene get paid to write songs. dean is paid a one-time fee of $20 plus $80 per day. karlene is paid a one-time fee of $25 plus $100 per day. write an expression to represent how much a producer will pay to hire both to work the same number of days on a song.