Question

28. Tell whether the sequence is arithmetic. If it is, what is the common difference?–12, –7, –2, 3, . . . (1 point)
yes; 5
yes; 8
yes; 3
no

Answer 1

Yes. 5.
The difference between successive terms is the same, and that is 5.

Answer 2

Thank you, here's a medal, I really do need to get these right.

Answer 3

:) It's a pleasure. When you have the same difference throughout successive terms in a sequence, it's arithmetic.