Plss help me ASAP pls

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.

286 divided by 457.6 what is the quotient?

How many variables are in 4x3 + 2y + 6?