Respuesta :

set the equation for AB equal to BC and solve for x giving you 16 than pull 16 into X in the AB equation giving you 21 for the measure of AB

Answer:

AB = 21 is the measurement.

Step-by-step explanation:

It is given in the question that B is the mid point of AC.

AB = x + 5 and BC = 2x -11

Since B is the midpoint of AC, therefore AB = BC

x + 5 = 2x - 11

2x - x = 11 + 5 = 16

x = 16

Therefore AB = x + 5 = 16 + 5 = 21

Length of AB is 21.