## Foreverisabell 2 years ago I have no idea how to do this. HELP PLEASE..Your grandmother called and asked you to come over. You rode your bike 15.25 miles in 30 minutes. How many miles per hour did you travel?

1. precal

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2. Foreverisabell

Im still confused?

3. precal

do you have a calculator? just divide those two numbers and that will be your solution

4. Foreverisabell

Yes I divided them & got 0.50 which isn't correct?

5. precal

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6. Foreverisabell

15.25 mph 61 mph 45.75 mph 30.5 mph

7. Foreverisabell

8. Foreverisabell

It has to be one of those. & idk how to find it?

9. Foreverisabell

Can we do it step by step?

10. precal

|dw:1363287108792:dw|that checks out

11. precal

mph is miles per hours

12. Foreverisabell

what is D?

13. precal

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14. Foreverisabell

what is D??? & R? & T?

15. precal

30.5 mph d is distance r is rate and t is time just your basic formula

16. Foreverisabell

so its 30.5?

17. Foreverisabell

mph?

18. precal

yes 30.5 mph

19. Mertsj

Oh my goodness!!! How many minutes in an hour? 60 of course so 15.25 miles in 30 minutes = x miles in 60 minutes.

20. Mertsj

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21. precal

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22. precal

this is called a proportion and that is another way to do this problem....

23. precal

Use dimensional analysis. miles per hour = $\frac{\text{miles}}{\text{hours}}$ $\frac{15+\frac{1}{4}}{\frac{30}{60}}=\frac{61}{2}=30.5$