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Elenna [48]
3 years ago
14

Shelly biked 21 miles in 4 hours. How long will it take Shelly to bike 63 miles?

Mathematics
2 answers:
nevsk [136]3 years ago
5 0
In order to do this, you need to use the equation:
distance=rate x time

So if you want to find out how long it will take you plug 63 miles into the equation.

63 miles=Rate x Time

You want to find out how long so you need the rate.

You can find the rate from the first sentence.

21miles=Rate X 4 hours
Rate=21/4 miles per hour
Plug this into the original equation.

63=(21/4)(time)

Time=12 hours
Anna35 [415]3 years ago
3 0
You can set up a proportion. So we see that shelly biked 21 miles in 4 hours. \frac{21}{4} * \frac{63}{x}. Now you can cross multiply and get 21x (21 * x) = 252 (63*4). Then use the division property of equality and divide both sides by 21 to get x = 12 hours. Therefore Shelly biked 63 miles in 12 hours. Hope this helps! :D. Feel free to ask more questions, or ask questions about my explanation.
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