So first you would use the PEMDAS method. You would begin by subtacting 12 and 5 which is 7 then you would 7 multiply by 12 which is 84. Lastly you would divide it by 6 which would leave you with your final answer 14
The answer is the option C and the option D, which are:
C. Double the number of pages in the book.
D. The age of my friend.
The explanation for this problem is shown below:
By definition, a variable is an unkown quantity. In the Option A the quantity is given: seconds in a minute. In the option B you know the quantity too, which is years old. But the option C and the option D does not give any quantity, you don't know the number of pages in the book or the age of the friend yet. Therefore, the answer is the options C and D.
Answer:
X=30
The whole triangle = 180 degrees
The function would be f(x)=11,500-.16xPlug in 4 for x