Simplify the expression z2-z(z+3)+3z

In the image, point a marks the center of the circle. which two lengths must form a ratio of 1 : 2? (options are in the images since thought they were harmful phrases)

Match each set of points with the quadratic function whose graph passes through those points

Determine the equivalent system for the given system of equations: 5x − 3y = 6 x + y = 2