100(12 / 82) = 14.6% approximately.
Answer:

Step-by-step explanation:
Because vertical angles are always equal, we want to solve
.
We can add 10 to both sides to get
.
We can subtract
from both sides to get
.
Lastly, we divide both sides by 20 to get
.
So,
and we're done!
The check is left as an exercise to the reader.
Answer:
D
Step-by-step explanation:
sine= opposite/hypotenuse
cosine= adjacent/hypotenuse
Answer:
c
Step-by-step explanation: