Question

Select each expression that has a value of 15 when x = 15. 3 15.521 + x O C. (3.015 + x) - 186 D. 20x2 + 30

Answer 1

A. x/3 + 10

Step-by-step 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.