Hey Cassidy.
Our goal is to combine like-terms.
Here are our terms:
3
+ 7
- 6
- 4
Let's combine like-terms.
3
- 6
= -3
7
- 4
= 3
We are left with:
3
- 3
Your answer is B.)
I hope this helps!
The answer is acute triangle because none of the angles are greater than 90°
It would be $54.00..........................