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777dan777 [17]
3 years ago
10

Please help me! i need to solve for m!

Mathematics
1 answer:
Stells [14]3 years ago
6 0

Answer:

m=30 look belowwwwwwwwwwwwwwwwwwwwwww

Step-by-step explanation:

i think m=30 because i mean 48-18=30 sooooo

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Tell whether the angles are complementary or supplementary. Then find the value of x.
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Answer:

x = 33

Step-by-step explanation:

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  2x + 24 = 90      {Subtract 24 from both sides}

          2x  = 90 - 24

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Step-by-step explanation:

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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:

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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

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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
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3 years ago
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