Question

ZB is 3x-5 BA is x+3
B is the midpoint of ZA. Find the length of ZA
A. 7
B. 9
C. 11
D. 14

Answer 1

If B is the midpoint of ZA, then ZB = BA
3x-5 = x+3
3x - x = 3 + 5
2x = 8
x = 8/2
x = 4

ZA = ZB + BA
      =  3x-5 + x+3
      = 3*4 - 5 + 4 + 3
      = 12 - 5 + 7 
      = 14

Answer: D. 14