Answer:
40 degrees
Explanation:
Hi, so basically angles AOB and BOC added together equal angle measure AOC. First, we have to substitute the values in.
108=(3z+4)+(8z-28)
Then, combine like terms
108=11z-24
Add 24 to both sides
132=11z
Divide both sides by 11
12=z
So now all we need to do to find measure AOB is substitute 12 for z in the given equation (AOB=3z+4)
AOB=3(12)+4
AOB=36+4
AOB=40
Hope this helps, let me know if you're still confused!