Answered

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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

Sagot :

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

[tex]T=\frac{90}{60}=\frac{9}{6}=\frac{\frac{9}{3}}{\frac{6}{3}}=\frac{3}{2}[/tex]

90 minutes = 3/2 hours

By using the rule of the distance

[tex]d=s\times t[/tex]

s is the speed

t is the time

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

[tex]\begin{gathered} d=x\times\frac{3}{2} \\ d=\frac{3x}{2} \end{gathered}[/tex]

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

The answer is B

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