If z is the midpoint of what are x, rz, and rt?

8x - 10 150

a. x = 18, rz = 134, and rt = 268
b. x = 22, rz = 150, and rt = 300
c. x = 20, rz = 150, and rt = 300
d. x = 20, rz = 300, and rt = 150