Jimmy can run 7.5 miles in 30 min. If he keeps this constant rate, how many hours will it take him to run 150 miles?

10 hours

Step-by-step explanation:

1. Create a chart.

miles    -  hours

7.5.       -   0.5 (30 minutes = 0.5 hours)

150.      -    x (let's use a variable to represent number of hours Jimmy ran)

2. Cross multiply:

7.5(x) = 150(0.5)

7.5x. = 75

3. To isolate x, divide both sides of equation by 7.5

7.5x/7.5 = 75/7.5

4. 7.5 crosses out with itself on the left side of the equation.

5. 75/7.5 = 10

x = 10

Therefore, Jimmy ran 150 miles in ten hours.