Find the acute angle between the lines. x+2y=7 and 5x-y=2
1 answer:
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Hopefully this helps
is it ten or tenth?
If it's ten,
88 = 90
18550 = 18550
Tenth
18550 = 18550.0
88=88.0
is it ten or tenth?
If it's ten,
88 = 90
18550 = 18550
Tenth
18550 = 18550.0
88=88.0
Answer:
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:
Where and
And the best way to solve this problem is using the normal standard distribution and the z score given by:
If we apply this formula to our probability we got this:
And the explanation of this number is:"The number of text messages for Kendra it's 2.26 deviations above the mean"