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PSYCHO15rus [73]
3 years ago
10

HELP!! HELP!! geometry

Mathematics
2 answers:
Viefleur [7K]3 years ago
7 0

Answer:

Pythagorean theorem

a²+b²=c²

ab + 7² = 8²

ab + 49 = 64

49 - 64 = ab

15

<em>Hope </em><em>this </em><em>will </em><em>help </em><em>you </em><em>if </em><em>not </em><em>so </em><em>advance</em><em> </em><em>sorry </em><em>!</em><em> </em>

Colt1911 [192]3 years ago
6 0

Answer:

Step-by-step explanation:

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The average and standard deviation of a measurement is 15.0 ± 5.0. if 100 students measured the value, how many would you expect
AURORKA [14]

Solution: We are given:

\mu=15, \sigma=5

Using the empirical rule, we have:

\mu \pm \sigma covers 68% of data.

Also the percentage of values below mean = Percentage of values above mean = 50%

Now, let's find the z score for x=20

z=\frac{20-15}{5}=1

Therefore, the percentage of values greater than 1 standard deviation above mean 50\% - \frac{68\%}{2} =50\%-34\%=16%

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3 years ago
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jonny [76]

Answer:

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Step-by-step explanation:

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2 years ago
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Answer:

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Step-by-step explanation:

Given that

2x - 7 = 9 ← solve for x

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x = 8

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The answer is in the attachment
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