If x = 5, what is the answer to 5x (x²/56)

What is the slope of a line that is perpendicular to y = 3x + 1

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.

Let f(x) = 5/x and g(x)=2x2+5x. what two numbers are not in the domain of f o g