Question

QuestionIf a car travels at an average speed of x miles per hour, how far would the car travel in 90 minutes?A. x/2 miles B. 3x/2 miles C. 2x miles D.9x/2 miles

Answer 1

Since the average speed of the car is x miles per hour, then

We have to change the 90 minutes to hours

Since 1 hour = 60 minutes, then

Divide 90 by 60 to change from minutes to hours

`T=(90)/(60)=(9)/(6)=((9)/(3))/((6)/(3))=(3)/(2)`

90 minutes = 3/2 hours

By using the rule of the distance

`d=s* t`

s is the speed

t is the time

Since s = x and t = 3/2, then

`\begin{gathered} d=x*(3)/(2) \\ d=(3x)/(2) \end{gathered}`

The car can travel 3x/2 miles in 90 minutes

The answer is B