Given the function f ( x ) = { 9 x + 10 x < 0 9 x + 20 x 0 f (

Given the function 
$f\left(x\right)=\{\begin{array}{cc}9x+10& x<0\\ 9x+20& x\ge 0\end{array}$

Calculate the following values: 
$f(-1)=$    
$f\left(0\right)=$    
$f\left(2\right)=$