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mina [271]
3 years ago
14

Which is the graph of 4x + 2y <3? 2 4 ) Intro Done

Mathematics
1 answer:
Umnica [9.8K]3 years ago
3 0

Answer:4

Step-by-step explanation:

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The correct answer should be D.

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Two times the sum of nine and a number is the opposite of 9.
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a 28 inch piece of steel is cut into three pieces so that the second piece is twice as long as the first piece, and the third pi
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Find the value for q for the following equation: 15q – 16 = 4(2q + 3)
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Answer:
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4 0
3 years ago
Read 2 more answers
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
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