Answer: 
Step-by-step explanation:
All that is required here is to substitute x = 2x into the right side in the same way that is done for a numeric value.

8.2*10^-5 can be also written as 0.000082, in standard notation.
Hope this helps.
Answer:
What are the possible values of x and y for two distinct points, (5,-2) and (x, y), to represent a function? The value of x can be:
A.) Any real number
B.) Any real number except 5
C.) Any real number except 5 and -2
The value of y can be:
A.) Any real number
B.) Any real number except -2
C.) Any real number except 5 and -2