Answer:
A: 10.9
Step-by-step explanation: -2.3 is 2.3 away from zero then add the length from zero to the postive number which in this case is 8.6, therefore the equation is 2.3 + 8.6 = 10.9
3,510
913=117
11730=3,510
3,510
Only 3 and 9 are both the subset of odd numbers and the subset of multiples of 3.