Answer:
6 + 7 = 13
Step-by-step explanation:
We are given the following information in the question:
We know that

We need this information to evaluate

The evaluation can be done with the help of using associative property and distributive property.
Associative property: (a + b) + c = a + (b + c)
The evaluation can be shown as:

13 + 15 + 18 +14 = 60 total hats
15 are white
60-15 = 45 hats that are not white
45/60 reduces to 3/4
3/4 =0.75 probability the hat will not be white
K = -7
The vertex shifted from (3,1) to (3,-6)
1-(-6) is 7, but it was shifted down, so -7