What is the answer? To this question

Which equations represents circles that have a diameter of 12 units and a center that lies on the y-axis? check all that apply

50 plz, given the system of equations, match the following items. x + 3 y = 5 x - 3 y = -1 a) x-determinant b) y-determinant c) system determinant match the following to the pictures below.

The table showed price paid per concert ticket on a popular online auction site. what was the average price paid per ticket