Find the equation of the tangent line to k(x)=x2 at x=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.

Find the unit rate for: 75% high-fiber chimp food to 25% high -protein chimp food.

Solve 13 + w/7= -18 (w/7 is a fraction)