B or (0,-2) is the answer i would go with
There are 4 students who have piercings both on their ear and their noses.
Answer:
3 + x
Step-by-step explanation:
Sum means to add, so you would just add 3 and x (since they haven't given an actual number and only a variable).
Answer:

Step-by-step explanation:
Using the general equation
, we already know that
and
, but we need to find
from the period:

Hence, the cosine function is 
The overall length would be 6in