33,29,25,21, determine if the sequence is arithmetic

Yes, in all cases the new term is 4 less than the previous term, and so this sequence is arithmetic.

Step-by-step explanation:

If arithmetic, this sequence must have one and only one difference between terms.

33 - 4 = 29

29 - 4 = 25

25 - 4 = 21

Yes, in all cases the new term is 4 less than the previous term, and so this sequence is arithmetic.

it is

Step-by-step explanation:

First differences are ...

29 - 33 = - 4 25 - 29 = - 4 21 - 25 = - 4

First differences are all the same, so we say the terms have a "common" difference. That is characteristic of an arithmetic sequence.

Yes, this sequence is arithmetic.