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Zina [86]
3 years ago
11

Two times a number puls three equals one half of the number plus 30. What is the number

Mathematics
1 answer:
Masja [62]3 years ago
7 0

Answer:18

Step-by-step explanation:2(18)+3=1/2(18)+30

36+3=9+30

39=39

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Is the U.S. ever on sale to canadians?
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2 years ago
Find the minimum sample size necessary to be 99% confident that the population mean is within 3 units of the sample mean given t
SVEN [57.7K]

Answer:

The minimum sample size required is 207.

Step-by-step explanation:

The (1 - <em>α</em>) % confidence interval for population mean <em>μ</em> is:

CI=\bar x\pm z_{\alpha /2}\frac{\sigma}{\sqrt{n}}

The margin of error of this confidence interval is:

MOE=z_{\alpha /2}\frac{\sigma}{\sqrt{n}}

Given:

MOE=3\\\sigma=29\\z_{\alpha /2}=z_{0.01/2}=z_{0.05}=2.576

*Use a <em>z</em>-table for the critical value.

Compute the value of <em>n</em> as follows:

MOE=z_{\alpha /2}\frac{\sigma}{\sqrt{n}}\\3=2.576\times \frac{29}{\sqrt{n}} \\n=[\frac{2.576\times29}{3} ]^{2}\\=206.69\\\approx207

Thus, the minimum sample size required is 207.

3 0
3 years ago
WILL GIVE BRAINLIEST!!!! 20 POINTS!!!! NEED ASAP!!!!
gulaghasi [49]

Answer:

Answer: The statements are numbers 1, 3, 4

The non statements are 2, 5, 6

Step-by-step explanation:

4 0
3 years ago
Please help as soon as possible
patriot [66]
17.5

5 is the og length. Scale factor is 3.5. So

5(3.5)=17.5
3 0
3 years ago
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