Paul received a $15 tip on a meal that cost $120
What percent of the meal cost was the tip?

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

Aperpendicular bisector, cd is drawn through point con ab if the coordinates of point a are (-3, 2) and the coordinates of point b are (7,6), the x-intercept of cd is point lies on cd.

Find the zeros of each function. f(x) = x^2 + 5x - 6