Answer:

Step-by-step explanation:
To calculate the angles of the given triangle, we can use the law of cosines:

Then, given the sides a=2, b=9, and c=8.

For B:

None of the above because (t+r) is just getting rid of the numbers which you can't do and I don't know where 4 even came from in b!
Answer:
divide both sides by 3
Step-by-step explanation:
so the answer should be x=3