The first term of an arithmetic sequence is - 5, and the tenth term is 13. Find the common difference.

8/9

1.8

2

2

Working

The nth term of an arithmetic series is calculated using the formula

nth term = a + (n-1) d

a = - 5, n = 10 and nth term in this case is 13

Thus

13 = - 5 + (10-1) d

13 = - 5+9d

9d = 18

d = 2