Question

I need help with this

Answer 1

Answer:

$\text{ 78 miles per hour}$

Step-by-step explanation:

Given the linear function for the traffic fines:

$f(s)=14(s-60)+40$

If a fine comes to $292, substitute f(s)=292 and solve for "s" to find the speed of the person:

$\begin{gathered} 292=14(s-60)+40 \\ 292=14s-840+40 \\ 14s=292+840-40 \\ 14s=1092 \\ s=\frac{1092}{14} \\ s=78\text{ miles per hour} \end{gathered}$