Answer: [tex]V=51\ \frac{mi}{h}[/tex]
Step-by-step explanation:
You need to used the following formula:
[tex]V=\frac{d}{t}[/tex]
Where "V" is the speed, "d" is the distance and "t" is the time.
In this case you know that Kevin traveled at a constant speed on the highway from Hickory Hills to Chicago in 20 minutes (which is [tex]\frac{1}{3}\ h[/tex]) and the distance is 17 miles. Then, you can identify that:
[tex]t=\frac{1}{3}\ h\\\\d=17\ mi[/tex]
Therefore, knowing these values, you can substitute them into the formula. Then, you get:
[tex]V=\frac{17\ mi}{\frac{1}{3}\ h}\\\\V=51\ \frac{mi}{h}[/tex]
