The answer is 7 because x+3 is 10. Hope this helped
Answer:
subtract 1 then divide 2
Step-by-step explanation:
We are going to need more contex to awnser this
Answer:
9. 
10. 
Step-by-step explanation:
9. Given the sequence

In this sequence,

Note that

then the common difference in this sequence is 
You have

then the explicit formula is

10. Given the sequence

In this sequence,

Note that

then the common difference in this sequence is 
You have

then the recursive formula is
