Answer:
A. x/3 + 10
Explanation:
According to the question, we are to choose the equation that will result in 15 if x = 15
Looking at the first option, we are given;
f(x) = x/3 + 10
if x = 15
f(15) = 15/3 + 10
f(15) = 5 + 10
f(15) = 15
Since the result is 15, hence option A is correct.
The other functions are incorrect because they will give a value that is not 15 when 15 is substituted as x.
