Use the distributive property to rewrite this expression, then simplify the new expression, if possible. -3(b+6)

Given the diagram below, michael writes, "segment ac is congruent to segment ac." which of the following reasons allow him to write this statement?

Find the length of the radius of a circle with the center at -7+2i and a point in the circle at 33+11i

What are the solutions for the following system? -2x^2+y=-5 y=-3x^2+5