Question

What are the next three terms in the sequence -1, 9, 19, 29

Answer 1

39, 49, 59

Explanation:

Note the difference between consecutive terms

9 - (- 1) = 9 + 1 = 10

19 - 9 = 10

29 - 9 = 10

The difference is a constant + 10

To obtain the next term in the sequence add 10 to the previous term

29 + 10 = 39

39 + 10 = 49

49 + 10 = 59

The next 3 terms are 39, 49, 59

Answer 2

39. each term is ten more than the term before it :)