Using exactly four 4s and any operations write an expression to equal the number 3

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.

Opposite angles in a parrellelogram are

What number is 7 units left of -15?