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juin [17]
4 years ago
10

Please helpp me thank you 20 pts

Mathematics
1 answer:
pogonyaev4 years ago
5 0
I'm pretty sure it is C

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The length of the hypotenuse of a 30-60-90 triangle is 9. What is the perimeter?
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3 years ago
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Help
kykrilka [37]

Let n =  the hours elapsed when the two trains are 660 miles apart.


Let the first train travel east and the second train travel west.

The distance traveled by the first train is

x = (50 mi/h)*(n h) = 50n mi


The distance traveled by the second train is

y = (60 mi/h)*(n h) = 60n h


The distance between the two trains after n hours is

x + y = 50 n + 60n = 110n mi


Because this distance is 660 miles, therefore

110n = 660

n = 6 hours


Answer: 6 hours


I hope this helps. Sorry it took so long

3 0
3 years ago
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