# Question #423f5

Jul 16, 2017

$- 210$

#### Explanation:

Let's break this down

$5 \left[\textcolor{red}{f \left(6\right)}\right]$

$\textcolor{red}{f \left(x\right)} = \textcolor{red}{- 7 x}$

$\textcolor{red}{f \left(6\right)} = \textcolor{red}{- 7 \left(6\right)}$

$\textcolor{red}{f \left(6\right)} = \textcolor{red}{- 42}$

Now we have $5 \left[\textcolor{red}{- 42}\right]$, which is $- 210$