### Home > CC4 > Chapter 1 > Lesson 1.3.1 > Problem 1-71

1-71.

If for a certain function, *f*(*x*) = 9, find the following values. Homework Help ✎

Since we know the value of

*f*(*x*) in this instance is 9, substitute 9 in for*f*(*x*)

Substituting 9 in for

*f*(*x*) gives 2·9 = 18.

Use what you learned in part (a) and (b). Pay attention to the Order of Operations!