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Given the function
` f(x)= {(5 x + 9, x<0),( 5 x + 18, x\geq 0):}`

Calculate the following values:
`f(-1)= `  
`f(0)= `  
`f(2)= `  

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   x  x  √  n√  |   | (   ) π ∞ DNE
   x  √  (   ) π ∞ DNE
( ) ( ] [ ) [ ] —∞ ∞ ∪ DNE
< > ≤ ≥ or All Real Numbers DNE
log logn ln n√  | | e 
sin cos tan arcsin arccos arctan ⟨ ⟩
[more..]