Mattyb turned nine in January 1012 OHHH HECK TO THE NO HE WILL BE 10
If you mean: -9-10+8 then their sum is -11
For 8 9 9 9 10 11 11 12: σ=1.3562
For LCM for the values: 11, 10, 9, 8, 7 is 17720
7 + 8 + 10 + 11 = 36 / 4 = 9
12+8+10+12+11+9 = 62
10
10
11 + 11 + 11 + 10 + 9 + 9 + 9 + 8 + 8 + 8 + 8 + 8 + 8 + 7 + 2 = 127
The average is 10.
9 and 10
9