Mathematics
OpenStudy (anonymous):

A train traveled 300 miles. How long did the trip take if the train was traveling at a rate of: Note * Use the d=rt formula (distance = rate * time). You may need to solve for the variable. (3) x mph (5) (x - 5)mph

OpenStudy (anonymous):

$t=\frac{d}{r}=\frac{300}{r}$