Answer:
77
Step-by-step explanation:
½ × base × height
½ × 11 × 14 = 77 units²
The parabola opens down, since the 'a' value of the equation is a negative value.
Answer:

Step-by-step explanation:
when multiplying exponents, as long as the base is the same, you add the power. 
Answer:
I believe it's 9
Step-by-step explanation:
Answer:

Step-by-step explanation:
The explicit formula for an arithmetic sequence is given by :
...(1)
We need to find the 200th term of the sequence.
Put n = 200 in equation (1)

So, the 200th term of the sequence is 418.