Ali has scored 88, 94, 82, and 83 on his previous four tests. what score does he need on his next test so that his average (mean) is 86?

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.