Answer: 
Step-by-step explanation:
 You need to used the following formula:
 
 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  ) and the distance is 17 miles. Then, you can identify that:
) and the distance is 17 miles. Then, you can identify that:
 
 Therefore, knowing these values, you can substitute them into the formula. Then, you get:
 