Answer:
Step-by-step explanation:
I’m in middle school
We're given two sides and the included angle and asked to find the third side. That's the Law of Cosines.


Answer:
6
Step-by-step explanation:
30-21=9
9/3=3
3x2=6
<span>4c-6+3c=-34
Add 3c to 4c
7c-6=-34
Add 6 to both sides
7c=-28
Divide 7 on both sides
Final Answer: c=-4</span>