Answer:
20 students?
and is this supposed to be coronavirus?
Step-by-step explanation:
Answer:
The nth term is given by: 
The 30th term is 78.
Step-by-step explanation:
Arithmetic sequence:
The nth term of an arithmetic sequence is given by:

In which
is the first term and d is the common difference between terms.
-9, -6, - 3,0
This means that
. So

30th term:

The 30th term is 78.
Answer:
,n n,
Step-by-step explanation:
Answer: C
Step-by-step explanation:
1 + 2sin(x+pi)
1 is adding to the y, so it is a vertical shift of 1 unit,
2 is a stretch because it is multiplying to the <em>sin, </em>
and pi is adding to the x, so it is a phase shift.
8^2 and 9^2. Because 8 squared equals 64 and 9 squared equals 81