Acircle has a center at (1,-2) and a radius of 4. does the point (3.4,1.2) lie on the circle? justify your answer

Three numbers x, y, and z are in the ratio 2: 7: 8. if 12 is subtracted from y, then three numbers form a geometric sequence (in the order x, y–12, z). find x, y, and z. there are 2 sets.