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wlad13 [49]
3 years ago
5

-4,-1 reflecting across x-axis

Mathematics
2 answers:
artcher [175]3 years ago
8 0

Answer:

-4,1

Step-by-step explanation:

Just multiply the y coordinate by -1

Rashid [163]3 years ago
5 0

Answer:

(-4,1)

Step-by-step explanation:

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Which ordered pair is not in the solution set of
Fed [463]

Answer:

the pair that is not a solution is d

Step-by-step explanation:

5 > 2(2) + 1

5 > 4 + 1

5 > 5

it is equal to and not greater than

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3 years ago
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A random sample of 20 purchases showed the amounts in the table (in $). The mean is $49.57 and the standard deviation is $20.28.
son4ous [18]

Answer:

The 98​% confidence interval for the mean purchases of all​ customers is ($37.40, $61.74).

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.98}{2} = 0.01

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.01 = 0.99, so z = 2.325

Now, find M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

M = 2.325*\frac{20.28}{\sqrt{20}} = 12.17

The lower end of the interval is the mean subtracted by M. So it is 49.57 - 12.17 = $37.40.

The upper end of the interval is the mean added to M. So it is 49.57 + 12.17 = $61.74.

The 98​% confidence interval for the mean purchases of all​ customers is ($37.40, $61.74).

3 0
3 years ago
A<br> B<br> C<br> D<br><br> Which is my answer ^
Mkey [24]

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Step-by-step explanation:


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Step-by-step explanation:

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Dahasolnce [82]

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Step-by-step explanation:

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8 0
2 years ago
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