Please answer this question b over 4 = 24??
My friend got this question and she is in grade 5! I am in an older grade and I still don't understand it!!
Please help!

Over which interval is the graph of f(x) = x2 + 5x + 6 increasing?

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.

Micheal is 4 times as old as brandon and is also 27 years older than brandon. how old is micheal