M(6, 6) is the midpoint of mc139-1.jpg. the coordinates of s are (8, 9). what are the coordinates of r?

Arandom high school question but a hard one

What is the multiple zero and multiplicity of f(x) = (x ? 3)(x ? 3)(x + 5)? multiple zero is 3; multiplicity is 2 multiple zero is 5; multiplicity is 1 multiple zero is ? 5; multiplicity is 1 multiple zero is ? 3; multiplicity is 2

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .