What goes across the top of a graph? HELP plzzz

Translate the word phrase into a math expression. 15 fewer than the product of 4 and a number. (pls immediately)

What is the standard form of -5x^2+2x^4-11+x^3+3x

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.