Question

use the following function rule to find f(3).
f(x) = 5 + 9x
f(3) = \boxed{}

Explanation:

Step1: Substitute $x=3$ into $f(x)$

$f(3) = 5 + 9\times3$

Step2: Calculate the multiplication first

$9\times3 = 27$

Step3: Calculate the final sum

$5 + 27 = 32$

Answer:

32