Is the given sequence arithmetic? If so, identify the common
difference,
10, 20, 30, 40

yes, 10

Step-by-step explanation:

Take the second term and subtract the first term

20-10 = 10

Take the third term and subtract the second term

30-20 = 10

Take the fourth term and subtract the third term

40-30 =10

Each time the difference is 10, so it is an arithmetic sequence

This is an arithmetic sequence and the common difference is 10