Re: A car moving at an average speed of x miles/hr, traveled

I see now. The stem is referring to the entire trip, not just one part of 1/2 of it. I am not used to the wording of these questions so I think more review will help me. I admit though, I am still a bit confused as to how #2 can say 30 minutes and why we don't plug in 30 for x for 30 miles/hour.

Thanks for the response!