The point A (6,3) maps onto A'(2,1) under a dilation with respect to the origin. what is the constant of dilation

Roger and natalie travel in similar cars. roger's car drives the two miles to school in 7.5 minutes. natalie drives the same distance in the opposite direction but in only 6.5 minutes. what is true of their velocities?

Find the measure of the interior angles of the following regular polygons: a triangle, a quadrilateral, a pentagon, an octagon, a decagon, a 30-gon, a 50-gon, and a 100-gon.

The measure of an angle is 117°. what is the measure of a supplementary angle?