<span> if x = 2
9x + 13 = 9*2 + 13 = 18 + 13 = 31
</span><span>D) 31</span>
Answer:
Acute
Step-by-step explanation:
This should be an acute triangle because if this was a right angle, then the three sides should be figured out by the Pythagorean Theorem.
An obtuse angle wouldn't be right either, you need an angle to be over 90.
The answer is B.




If you find a common denominator, the process becomes much easier. I hope this was helpful.
Answer:
Step-by-step explanation:
reference angle=(14 π)/11-π=(14-11)π/11=3π/11