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

2 answers:

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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Find x<br> A. 22√2<br> B. 22<br> C. 11√3/3<br> D. 11√3

mel-nik [20]

Answer

$22\sqrt{2}$

Step-by-step explanation:

First we gave a name to the side that is common for both triangles, can be Y for example.

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$sin(45)=\frac{11}{Y} \\$ , Because sin(x)= op/hip

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Having this equations, we can solve the system and find x

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we equal Y and solve

$\frac{11}{sin(45)}=cos(60)*x\\ x=\frac{11}{sin(45)*cos(60)} \\x=\frac{11}{\frac{\sqrt{2} }{2} *\frac{1}{2} } \\x=\frac{11}{\frac{\sqrt{2} }{4} } \\x=\frac{44}{\sqrt{2} }\\$