To write an expression in function notation, you must solve it for the dependent variable.
Assuming that you want the expression to be written in the form
(i.e., assuming that x is the independent variable), we have to solve the expression for y, which means that we want y to remain alone on the left hand side, and move everything else to the right hand side.
So, first of all, we can add 9x to both sides to get

Finally, we divide both sides by 3:

I did the whole problem for you and the answer is x=3
The greatest common factor is B) 3x^2.
In order to find this, we must first look to see the smallest number of x's in a term. The final term 6x^2 (which could also be expressed as 6xx), has 2. Therefore we know we can take out x^2.
The next thing we look for is a number that goes in evenly to all terms. It's easiest to start with the smallest number and it's factors. 6 is the smallest number and it's factors are 6, 3, 2, 1.
Since 6 does not go in evenly to 27, we try 3. 3 goes in evenly to both 27 and 12. Therefore, we can use 3.
The end result is 3x^2
Answer:
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100 because of complementary angles