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Nostrana [21]
3 years ago
15

Which ordered pair is a solution of the equation?

Mathematics
1 answer:
zavuch27 [327]3 years ago
3 0

Answer:

(choice D)

Neither is the answer for the question you asked becaure x - y = 0

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The number of text messsages that teenagers send per month is normally
ki77a [65]

Answer:

z=\frac{4415-3400}{450}=2.26

And the explanation of this number is:"The number of text messages for Kendra it's 2.26 deviations above the mean"

Step-by-step explanation:

1) Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

2) Calculate the z score

Let X the random variable that represent the number of text messages per month, and for this case we know the distribution for X is given by:

X \sim N(3400,450)  

Where \mu=3400 and \sigma=450

And the best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\sigma}

If we apply this formula to our probability we got this:

z=\frac{4415-3400}{450}=2.26

And the explanation of this number is:"The number of text messages for Kendra it's 2.26 deviations above the mean"

6 0
3 years ago
I'll give brainliest!!!!
Anna [14]

Answer: B

Step-by-step explanation:

3 0
2 years ago
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Which points define the solution set of this linear-quadratic system of equations?
mezya [45]
The answer is a.
Point A and point B
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1 - f = -5 the answer has to be 6 (show work) (please)
Anestetic [448]

Answer:

it is 6 because there is no other explanation to 1-f f=6!

Step-by-step explanation:

all i did was look 1 - f = 5 then f equaled 6!

8 0
3 years ago
1 5/18 + 1 5/18 + 17/18 + 17/18
xenn [34]

Answer:

4.444

Step-by-step explanation:

mark me brainliest plz

6 0
3 years ago
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