### Home > INT1 > Chapter Ch1 > Lesson 1.3.1 > Problem1-71

1-71.

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

1. $f ( x ) + 3$

• Since we know the value of f(x) in this instance is 9, substitute 9 in for f(x)

1. $\quad 2 f ( x )$

• Substituting 9 in for f(x) gives 2·9 = 18.

1. $2 f ( x ) + 3$

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