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2 years ago

Are KP and PK the same ray? Are NM and MN the same ray? Explain your answer.

Mathematics

1 answer:

Kazeer [188]2 years ago

8 0

KP and PK cannot be the same ray and also NM and MN cannot be the same ray.

Explanation:

A Ray is said to be a single straight unidirectional infinity line. We can determine the starting point of a ray whereas we can't plot the endpoint of the ray.
So PK and KP cannot be the same ray and there can't be the existence of such ray with the two points.
In the same way, NM and MN can't be described as a ray because it doesn't satisfy the requirement of the ray.
Hence the above coordinates cant be the same ray.

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2 years ago

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2 years ago

Please help I don’t understand

KIM [24]

Answer:

The equivalent ratios are:

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Step-by-step explanation:

It is given that the ratios are equivalent ratios. So all the ratios will simplify to the same ratio. We can use this to find the ratios.

given ratio is:

16:10

which simplifies to

8:5

We can observe that the second ratio will be same 8:5

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Hence,

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16:10

8:5

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1 year ago

The population standard deviation for the temperature of beers found in Scooter's Tavern is 0.26 degrees. If we want to be 90% c

siniylev [52]

Answer:

19 beers must be sampled.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1 - 0.9}{2} = 0.05$

Now, we have to find z in the Z-table as such z has a p-value of $1 - \alpha$ .

That is z with a pvalue of $1 - 0.05 = 0.95$ , so Z = 1.645.

Now, find the margin of error M as such

$M = z\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

The population standard deviation for the temperature of beers found in Scooter's Tavern is 0.26 degrees.

This means that $\sigma = 0.26$

If we want to be 90% confident that the sample mean beer temperature is within 0.1 degrees of the true mean temperature, how many beers must we sample?

This is n for which M = 0.1. So

$M = z\frac{\sigma}{\sqrt{n}}$

$0.1 = 1.645\frac{0.26}{\sqrt{n}}$