Answer:
-1
Step-by-step explanation:
The common difference is the constant amount of change between the numbers in an arithmetic sequence.
To find the common difference, you take the last term and subtract it by the previous term.

7 and 9
7^2=49
9^2=81
49+81=130
Answer:
11
Step by step explanation:
2x4=8
8+3=11
This answer is 76 let me know if I’m wrong