Answer:
- 
Step-by-step explanation:
Given
f(x) =
- 
Evaluate f(19) by substituting x = 19 into f(x)
f(19) =
- 
=
- 
=
- 4
=
-
= - 
16-3/4=15 1/4
You can convert to fractions first, and then convert back to a mixed number like:
16/1-3/4 and when you add/subtract fractions you need a common denominator
64/4-3/4
61/4
15 1/4
Or you can convert your fraction to a decimal to get:
16-0.75
15.25