Foreverisabell
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?
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precal
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|dw:1363286853504:dw|
Foreverisabell
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Im still confused?
precal
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do you have a calculator? just divide those two numbers and that will be your solution
Foreverisabell
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Yes I divided them & got 0.50 which isn't correct?
precal
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Foreverisabell
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15.25 mph
61 mph
45.75 mph
30.5 mph
Foreverisabell
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Those are my answer?
Foreverisabell
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It has to be one of those. & idk how to find it?
Foreverisabell
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Can we do it step by step?
precal
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|dw:1363287108792:dw|that checks out
precal
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mph is miles per hours
Foreverisabell
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what is D?
precal
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|dw:1363287263174:dw|
Foreverisabell
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what is D??? & R? & T?
precal
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30.5 mph
d is distance r is rate and t is time just your basic formula
Foreverisabell
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so its 30.5?
Foreverisabell
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mph?
precal
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yes 30.5 mph
Mertsj
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Oh my goodness!!! How many minutes in an hour? 60 of course so 15.25 miles in 30 minutes = x miles in 60 minutes.
Mertsj
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precal
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|dw:1363287515321:dw|
precal
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this is called a proportion and that is another way to do this problem....
precal
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notice everyone wants to help you at this point.......
robtobey
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Use dimensional analysis.
miles per hour = \[\frac{\text{miles}}{\text{hours}} \] \[\frac{15+\frac{1}{4}}{\frac{30}{60}}=\frac{61}{2}=30.5 \]