To find the product of the absolute values of |-9 3/7| and |7 11|:

|-9 3/7| = |-64/7| = 64/7
|7 11| = |7 + 11| = |18| = 18

Now, find the product of 64/7 and 18:
64/7 18 = 64 18 / 7 = 1152 / 7

To find the sum of the result above and |-2,9|:

1152 / 7 + |-2,9| = 1152 / 7 + 2.9 = 1152 / 7 + 2.9 = 1152 / 7 + 20/7 = 1172 / 7

Therefore, the final result is 1172/7.