# Algebra Examples

Evaluate the Piecewise Function f(x)=3-5x if x<=3; 3x if 3<x<7; 5x+1 if x>=7 , f(5)
,
Identify the piece that describes the function at . In this case, falls within the interval , therefore use to evaluate .
The function is equal to at .
Evaluate the function at .
Multiply by .