An arithmetic sequence has a first term of 3 and a fifth term of 31. What is the second term?

10

Step-by-step explanation:

let's call the difference in each term d so the sequence would look like

3, (3+d), (3+2d), (3+3d), (3+4d)

notice how in this sequence that (3+4d) is the fifth term so it must equal 31

3+4d=31

4d=28

d=7

now plug this into the second term

(3 + (7))

and we see that the second term is 10