HELLLP ME PLEASE

How much orange juice do you need to make 2 servings of lemony orange slush?

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.

Two numbers have a sum of -19. one number is x. what expression represents the other number?