Pls help me and I’ll give brainliest

The difference of 2 numbers is 21 and the quotient of the equation is 4 then what are the two numbers?

Select the quadratic that has root x = 8 and x = -5

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.