Help? Please?
Due today

Answer this question, only if you know the answer. 30 points and brainliest!

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?

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.