Answer :
Answer:
[tex]AB = 40[/tex]
Step-by-step explanation:
Given
[tex]AB =x + 15[/tex]
[tex]BC = 2(x - 5)[/tex]
Required
Find AB
Since B is the midpoint the:
[tex]AB = BC[/tex]
[tex]x + 15 = 2(x - 5)[/tex]
[tex]x + 15 = 2x - 10[/tex]
Collect Like Terms
[tex]2x -x = 15 +10[/tex]
[tex]x = 25[/tex]
Substitute 25 for x in [tex]AB =x + 15[/tex]
[tex]AB = 25+15[/tex]
[tex]AB = 40[/tex]