To find the missing term in the analogy, let's examine the pattern between the given pairs:
9:11 :: 29:21 :: 37:?
In the first pair, 9 is related to 11. By subtracting 2 from 9, we get 11.
In the second pair, 29 is related to 21. Again, by subtracting 2 from 29, we get 21.
Following the same pattern, in the third pair, we should subtract 2 from 37 to find the missing term:
37 - 2 = 35
Therefore, the missing term is 35.
