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Paraphin [41]
3 years ago
9

What is the length of side BC of the triangle? explain how you did it please.

Mathematics
1 answer:
frozen [14]3 years ago
3 0
I hope this helps you

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According to the empirical (69-95-99.7) rule, if a random variable z has a standard normal distribution, then approximately 95%
Dmitry_Shevchenko [17]

Using z-scores, it is found that the value of z is z = 1.96.

-----------------------------

Normal Probability Distribution

Problems of normal distributions can be solved using the z-score formula, which for a measure X, in a distribution with mean \mu and standard deviation \sigma, is given by:  

Z = \frac{X - \mu}{\sigma}

  • It measures how many standard deviations the measure is from the mean.
  • Each z-score has an associated p-value, which is the percentile.

  • The normal distribution is symmetric, which means that the middle 95% is between the <u>2.5th percentile and the 97.5th percentile</u>.
  • The 2.5th percentile is Z with a p-value of 0.025, thus Z = -1.96.
  • The 97.5th percentile is Z with a p-value of 0.975, thus Z = 1.96.
  • Thus, the value of Z is 1.96.

A similar problem is given at brainly.com/question/16965597

7 0
2 years ago
Let z = 5. What is the value of (10 + 25) ÷ z?
Murrr4er [49]

Answer:

<h2>A. 7</h2>

Step-by-step explanation:

Put z = 5 to the expression (10 + 25) ÷ z:

(10 + 25) ÷ 5 = 35 ÷ 5 = 7

5 0
3 years ago
What is -1/19,7/4,-4/7 in least to greatest
r-ruslan [8.4K]

Answer:

-4/7 is the smallest. then it's -1/19 and then finally it's 7/4

7 0
3 years ago
Read 2 more answers
If I'm 11 years old I was born on Oct 7 2005 and it is June 20th 2017 how many days old am I.
tensa zangetsu [6.8K]
4,274 days old. Hope that helps!
5 0
2 years ago
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You eam (4x + 12) points after completing x levels of a video game and
EastWind [94]

Answer: (4x+12) - (2x-5)

Step-by-step explanation: The (4x+12) is positive and the (2x-5) is negative.

5 0
3 years ago
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