There are 6 girls for every 3 boys if there are 63 kids in math class, how many of them are boys? how many of them are girls?

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.