<u>Answer:</u>
a = 8.1
<u>Step-by-step explanation:</u>
Use the cosine rule:

Substituting the values:

⇒ 
⇒ 
Is it number 21 you need help with?
Answer:
1 is 136, 2 is 44, annd 4 is 44
Step-by-step explanation:
Answer:
We just have to switch the positions of p and q so the answer is A.
Answer:
The awnser is D hope this helps :)
Step-by-step explanation: