$\text { Evaluate the function } f ( x ) = \left\{ \begin{array} { l }
2 x + 1 , x

Name: $\text { Evaluate the function } f ( x ) = \left\{ \begin{array} { l } 2 x + 1 , x < 0 \\ 2 x + 2 , x \geq 0 \end{array} \text { at } f ( 5 ) \right.$ A) $f ( 5 ) = 6$ B) $f ( 5 ) = 5$ C) $f ( 5 ) = 13$ D) $f ( 5 ) = 11$ E) $f ( 5 ) = 12$
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Question

$\text { Evaluate the function } f ( x ) = \left\{ \begin{array} { l } 
2 x + 1 , x < 0 \
2 x + 2 , x \geq 0
\end{array} \text { at } f ( 5 ) \right.$ 
A) $f ( 5 ) = 6$
B) $f ( 5 ) = 5$
C) $f ( 5 ) = 13$
D) $f ( 5 ) = 11$
E) $f ( 5 ) = 12$

Quizplus · Accepted Answer

Since $5 \geq 0$, we use the second equation which gives $f(5)=2(5)+2=\boxed{12}$.

Evaluate the function f(x)={2x+1,x<02x+2,x≥0 at f(5)\text { Evaluate the function } f ( x ) = \left\{ \begin{array} { l } 2 x + 1 , x < 0 \\2 x + 2 , x \geq 0\end{array} \text { at } f ( 5 ) \right. Evaluate the function f(x)={2x+1,x<02x+2,x≥0​ at f(5)

$\text { Evaluate the function } f ( x ) = \left\{ \begin{array} { l } 2 x + 1 , x < 0 \\2 x + 2 , x \geq 0\end{array} \text { at } f ( 5 ) \right.$