<h2>
Hello!</h2>
The answer is:
A.

<h2>Why?</h2>
To solve the problem, we need to perform the shown operation.
We have the functions:

So, performing the following operation, we have:



Hence, we have that the correct option is:
A. 
Have a nice day!
Answer:
I am pretty sure it is A. relation, i hope it is right.
hope that helps *^^*
Answer:
The Answer is;
No, it is not a valid inference because his classmates do not make up a random sample of the students in the school.
Step-by-step explanation:
You cannot make a valid inference of the preference of watching TV talk shows by only considering students in one class. You have to randomly select people from the whole population (i.e the total number of students in the school) and then make an inference.
The value 600 is 30 times as much as 20
<h3>Ratio and proportion</h3>
Ratio are written in terms of fractions. The expression 600 is how many times as much as 20 can be written as;
600 = x *20
where x is the required value or factor
20x = 600
Divide both sides by 20
20x/20 = 600/20
x = 30
Hence the value 600 is 30 times as much as 20
Learn more on ratio and proportion here: brainly.com/question/19994681
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C., because 60 is half of 120, and 12% is half of 24%
hope it is right