The answer is A, 13. Since we know line DB is a median (the middle), it tells us that line BC must equal line AB. Simply just do 26/2.
Answer:
or <em>0.35</em>
Step-by-step explanation:

Now simplify.
= 
The 3 angles must add up to 360 degrees
Only 1 and 4 fit the bill.
Answer:
s=x/3+10/3
Step-by-step explanation: