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adell [148]
3 years ago
8

WILL MARK BRAINLYEST

Mathematics
2 answers:
pashok25 [27]3 years ago
5 0

Answer:

y+1=\frac{6}{11}(x+4)

The image below shows proof that the point-slope equation y+1=\frac{6}{11}(x+4) is the correct equation in point-slope form that the line passes through the points (7, 5) and (-4, -1)

<em>Hope this helps!</em> :)

Veseljchak [2.6K]3 years ago
3 0

Answer:

y - 5 = 6(x - 7)

Step-by-step explanation:

yes

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In a sample of 1000 cases, the mean of a certain test is 14 and the standard deviation is 2.5. Assume the distribution to be nor
Maslowich

Answer:

The top 20% of the students will score at least 2.1 points above the mean.

Step-by-step explanation:

When the distribution is normal, we use the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

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

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

The mean of a certain test is 14 and the standard deviation is 2.5.

This means that \mu = 14, \sigma = 2.5

The top 20% of the students will score how many points above the mean

Their score is the 100 - 20 = 80th percentile, which is X when Z has a pvalue of 0.8. So X when Z = 0.84.

Their score is:

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

0.84 = \frac{X - 14}{2.5}

X - 14 = 0.84*2.5

X = 16.1

16.1 - 14 = 2.1

The top 20% of the students will score at least 2.1 points above the mean.

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2 years ago
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3 years ago
A word problem for the expression 5+(-2) The sum will be three i just need a word problem
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Answer:

Mikey had 5 cookies. His friend took 2 with him when he left. How many cookies does Mikey have left?

Step-by-step explanation:

Here, 5 would be the starting amount.

-2 would be the amount taken away.

3 would be our final answer.

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