I am in 9th grade, if you have 889,865x999,786 what doe it equal also yes i am not in virtual school and teacher will not let me use a calculatar

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.