Question

Gianah lives in Milton. She bought a bus ticket to travel to her cousin's house in Orlando. She gets on the bus in Mobile.The distance between two cities are 300 kilometers and the bus drives 70 kilometers per hour. If the bus is 30 kilometers away from Orlando, which of these following equations represents the hours, h, the bus has travelled.

Answer 1

The correct answer is:

A) 300-70h = 30

Explanation:

The variable h represents the number of hours.  

The distance between Mobile and Orlando is 300 km; the bus is traveling at 70 km/h, and for h hours, this gives us the expression 70h for the distance the bus travels.

300-70h gives us the difference between the total distance between the cities and the distance the bus has traveled.  Since the bus is 30 km from Orlando, there will be 30 km left; this gives us 300-70h = 30.

Answer 2

The answer is A. 300 kilometers to the destination only goes down when you're driving towards it, so it's subtraction. Also, you can't have negative kilometers, so that's just common sense.