What mathematical operation always results in a positive number?(the picture shows the answers)

Which sentence describes why polygon mnop is congruent to polygon jklp? a. polygon jklp maps to polygon mnop through a translation. b. polygon jklp maps to polygon mnop through a rotation. c. polygon jklp maps to polygon mnop through a dilation. d. polygon jklp maps to polygon mnop through a stretch.

Average acceleration: i have no idea how to do this.

M. xyz =radians. covert this radian measure to its equivalent measure in degrees.