Answer:
AB=1
Step-by-step explanation:
Colinear means all points are on the same line. We need to find the measure of AB.
Using the segment addition postulate,
ab+bc=ac
Subsitue this for our known values
[tex]2x + 15 + 9 = x + 17[/tex]
Solve for x
[tex]2x + 24 = x + 17[/tex]
[tex]x + 24 = 17[/tex]
[tex]x = - 7[/tex]
Plug this in for AB
[tex]2( - 7) + 15 = 1[/tex]
