Distance between two points
(-5;5) and (3,-3)

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)

Ms. ortiz sells tomatoes wholesale. the function p(x)=-80x^2+320x-10, graphed below, indicates how much profit she makes on a load of tomatoes if she makes on a load of tomatoes if she sells them for 4-x dollars per kilogram. what should ms. ortiz charge per kilogram of tomatoes to make on a load of tomatoes?

Are the corresponding angles congruent? explain why or why not.