The function $f$ is defined by $f (x) = 2 x - 7$ . Find $f^{- 1} (11)$ .

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The functions $f$ and $g$ are defined by $f (x) = 2 x + 3$ and $g (x) = x^{2} + 5$ . Find the value of $f g (2)$ .
The functions $f$ and $g$ are defined by $f (x) = 3 x - 1$ and $g (x) = x^{2} + 4$ . Find the value of $f g (2)$ .
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