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3 years ago

The time it takes to fly from Los Angeles to New York varies inversely as the speed of the plane. If

Mathematics

1 answer:

makvit [3.9K]3 years ago

3 0

Answer: speed is 540 km/h

Step-by-step explanation: Lets mark speed as v.

Because distenace is same, you can mark 6 h · 900 km/h = 10 h · v

and v = 5400 km / 10 h = 540 km/h.

Or using inverse proportions : 10 h / 6 h = v / 900 km/h .

Before multiplying you turn lastproportion around :

10 h / 6 h = 600 km/ h / v ,which gives 10 v = 6 · 900 km/h

and result is same

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4 years ago

A coin is tossed 15 times. Find the probability of tossing seven or eight heads.

Mamont248 [21]

We will use Binomial Distribution in this case.

Since the coin is tossed 15 times. N which is the number of trails will be 15.

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10.7K viewsView upvotes

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Related Questions (More Answers Below)

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3 years ago

What is the solution to the equation <br> ?<br> 1/x=x+3/2x2

victus00 [196]

Answer:

x = 0 , 3

Step-by-step explanation:

$\frac{1}{x}=\frac{x+3}{2x^{2}}\\\\1*2x^{2}=x*(x+3)\\\\2x^{2}=x*x+x*3\\\\2x^{2}=x^{2}+3x\\\\2x^{2}-x^{2}-3x = 0\\\\x^{2}-3x =0\\\\x(x-3)=0$

x = 0 ; x - 3 = 0

x = 0 ; x = 3

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3 years ago