Answer:
=3
Step-by-step explanation:
following the order of operations, whatever is in the parentheses gets done first. so you would add 13 + 2 and get 15. then you would subtract 9-4 and get 5. then you would divide the numbers that you got and get 3.
It is 8 units because if you start at -5,2 you will have to go up 8 units to get to -5,10. They are 8 units away from each other.