You add all the sides together and divide by the number of side so in your case it would be 6 sides and you should get your perimeter i think thats how you do it i could be wrong
15. -2
16. A. The pool was originally empty
Answer:
Given the graph
and 
We have to find the value of k;
Since, g(x) = f(x) +k

Subtract
from both sides we get;

Add 2 to both sides we get;

Simplify:

or
k = 5
Therefore, the value of k = 5
The answer is C, the first number in the equation is going to be multiplied separately by the ones inside the parentheses, which is that number distributing.