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ser-zykov [4K]
3 years ago
6

8x-7x=x-8 answer and show work

Mathematics
2 answers:
swat323 years ago
7 0

x=x-8

x-x= -8

x=-8

-x=0

No Solution

Alekssandra [29.7K]3 years ago
3 0
8x - 7x = x - 8
0x = -8
No solution
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For a given IQ test, an individual is considered a genius if their score falls more than three standard deviations from the mean
ki77a [65]

Answer:

P(Z>3) = 1-P(Z

So then the probability that an individual present and IQ higher than 3 deviation from the mean is 0.00135

And if we find the number of individuals that can be considered as genius we got: 0.00135*1500=2.025

And we can say that the answer is a.2

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) Solution to the problem

Let X the random variable that represent the IQ scores of a population, and for this case we know the distribution for X is given by:

X \sim N(\mu=?,\sigma=?)  

We are interested on this probability

P(X>X+3\mu)

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}

And we can find the following probablity:

P(Z>3) = 1-P(Z

So then the probability that an individual present and IQ higher than 3 deviation from the mean is 0.00135

And if we find the number of individuals that can be considered as genius we got: 0.00135*1500=2.025

And we can say that the answer is a/2.0

3 0
3 years ago
Which fraction is equivalent to 1/2? Use the number line to help answer the question
myrzilka [38]

Answer:

4/8

Step-by-step explanation:

4 0
2 years ago
Did I do it right????
den301095 [7]
The answer to number 1 is 3 or 1

The answer to number 2 is 4+x < 6
4 0
2 years ago
H i here are some p o i n t s<br> have a great day everyone!!!!!!!!!!!!!!!!!!!!
jasenka [17]
Thank youuu i needed to answer questions so I can keep reposting my questions until someone answers them so ty for this :)
5 0
2 years ago
Read 2 more answers
Evaluate (-B)2 for A = 5, B = -4, and C = 2.
xeze [42]

Answer

8

Step-by-step explanation:

-B = -(-4) = 4 x 2 = 8

8 0
3 years ago
Read 2 more answers
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