0 - 18 = -18
-18 + 9 = -9 ft
When ever you combine different elements the chemical properties change because elements are different , unless you combine the exact same elements.
I'm pretty sure the answer is "A matrix separates rational and irrational numbers." (Note: I'm not that great with memorizing definitions, but I'm pretty sure.) Hope this helps :)
Answer:
The degree of the function is;

Explanation:
From the given graph, we can observe that the function has two extremum (one minima and one maxima).
The degree of the function will be the number of extremum plus 1;

Since there are two extremum on the graph then;

Therefore, the degree of the function is;
The only whole number that isn’t a natural number is 0