Gianab lives in milton. she bought a bus ticket to travel to her cousins house in orlando. she gets on the bus in mobile. the distance between two cities is 300 kilometers and the bus drives 70 kilometers per hour. if the bus is 30 kilometers aaay from orlando, which of the following equations represents the hours, h, the bus traveled?
a. 300-70h=30
b. 300+70h=30
c. 300+70h=-30
d. 300-70h=-30

Well, (obviously from the answer choices) the only info needed is that she lives in one place, her cousin lives in another. In between the two cities is 300 km. The bus is traveling at 70km/h. 
The hours, (h) goes to the 70, as that is how fast it traveled for so long. You take the 300-70h= the extra 30 is still has to travel. So, your equation is:
300-70h=30
I believe this is right.
~Hope this helps!