Answer:
13
Step-by-step explanation:
8 - (-5) = 13
Since x is the same in both points we only have to count the y
Hello, please consider the following.

For the second we will need to put on the same denominator.

Thank you.
It's an example of rotation symmetry, if the image appears unchanged. If the rotation symmetry exists there is a one centre point around which an image appears unchanged.
Probability = amount of blue/ amount of all
Probability = 4/12
Probability = 1/3