Answer:
I am going to give this to someone and see if they can help!
Step-by-step explanation:
The keyword is "sum" which tells you x, y, and z are being added. One half of the sum means that the sum of the three numbers is going to be divided by 2.
x + y + z
------------
2
Answer:
The answer to this question is that the average rainfall varies by 0.07 each year.
Step-by-step explanation:
A, because you if you try to divide 0 into 15 parts you get 0