Answer:
2. 12 2/9
Step-by-step explanation:
Because of the choices, I assume the three addends are mixed numerals:
3 4/7 + 4 2/9 + 4 3/7 =
= 3 + 4 + 4 + 4/7 + 2/9 + 3/7
= 11 + 7/7 + 2/9
= 11 + 1 + 2/9
= 12 2/9
Answer: 2. 12 2/9
sqrt(1^2 + 2^2)
0.81
