find the next three terms in the sequence

-1,9,19,29...

The sequence is increasing by 10 each time, so the next three terms are:

39, 49, 59

To find the next terms in the sequence, we need to identify the pattern. Looking at the given numbers, we can see that each term is obtained by adding 10 to the previous term.

Starting with the last given term, which is 29, we can find the next term by adding 10:

29 + 10 = 39

Therefore, the next term in the sequence is 39.

To find the subsequent terms, we repeat this process:

39 + 10 = 49
49 + 10 = 59

Therefore, the next three terms in the sequence are 39, 49, and 59.