Question 62268
Distance = (Rate)(Time) [Use the distance formula]
28 miles = (rate)(30 minutes X 1 hour/60 minutes)[plug-in the values; change minutes to hours and solve]
.
28=(r)(.5)
28=.5r [solve for the rate (r)
28/.5=r
56 miles per hour = r
.
Check by plugging in all of the values back into the original equation:
d=rt
28=(56)(.5)
28=28 [checks out]