s the following sequence arithmetic? If so, identify the common difference. 2.9, 2.7, 2.5, 2.3, . . .?

2.9, 2.7, 2.5, 2.3, . . .

a₂ - a₁ = 2.7 - 2.9 = -0.2
a₃ - a₂ = 2.5 - 2.7 = -0.2
a₄ - a₃ = 2.3 - 2.5 = -0.2

Hence, this is an arithmetic sequence with common difference = -0.2

...... The answer is : b) yes, -0.2

If you add -0.2 to each term do you get the next term?

Yes.

That makes -0.2 the common difference. And since there is a common difference, then yes it's an arithmetic sequence. So you are correct.

The terms keep decreasing by 0.2
Common difference is -0.2