Question

18,15,22,...is a arithmetic sequence what is the common difference

Answer 1

The number on the left minus the number on the right always equal 3

For example: 18 - 15 = 3

                       15 - 12 = 3

                           ...

Answer 2

Answer:

-21-18=3

-15-12=3

Step-by-step explanation:

Answer is 3