True or False

1. Is the sequence arithmetic: 17, 9, 1, -7, ...?

2. Is the sequence arithmetic: -3, 3, -3, 3, ...?

3. The common difference for an = 3n + 15 is 15.

4. Is the sequence arithmetic: 37, 31, 25, 19, ...?

5. The common difference for the 3rd term = 22 and the 5th term = 36 is 7.

6.Is the sequence arithmetic: 78, 785, 7855, 78555, ...?

7. Is the sequence arithmetic: 2, 6, 18, 54, . . . ?

8. Is the sequence arithmetic: 1, 1, 2, 3, 5, 8, 13, . . .

9. The common difference for the sequence -18, -14, -10, -6, -2 is -4

10. The common difference for the sequence -15, -6, 3, 12 is 9?​