Answer:-8 is the first one.
Step-by-step explanation:-3(2)-2
-6-2
Hopefully this helps you understand the rest (and I was just too lazy to do all of them).
Can you provide an image of the frequency table?

The formula of the sum of an arithmetic sequence:

We have:

substitute:

Answer: b. 21
Answer:
81
Step-by-step explanation:
replace x with 9 so it's 9x9 which is 81