Three point-masses my are located on the -axis: The mass m1 = 12 is located at the point 2: = -3, the mass m2 = 15 is located at the point 2 = 2, and mass my = 20 is located at the point 2 = 8. m = 12 m, = 15 m3 = 20 -3 0 8 X Find the moment M of the system about the origin and the center of mass . If your answer is not a whole number, enter it as a decimal rounded to two places. M = Ex =