Answer:
Let's say that x is sam's age and y is Amy's age
x=y-4
and five years ago:
x-5=(y-5)/2
y-4-5=(y-5)/2
2y-18=y-5
y=13
x=9
then:
sam's age is 9 and Amy's age is 13
What are the answer choices?
C. is not a function since all the F9x) numbers are identical
The answer is B
Because if you use your calculation right you would end up with 16,463