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vovikov84 [41]
3 years ago
7

If A || B and B | y, then ?

Mathematics
1 answer:
aniked [119]3 years ago
8 0

Answere: I believe that the answere is C.

Step-by-step explanation:

Well,since the lines A and B are paralel and the line y is not paralel with any of then y and A are not paralel.Plus there is not a line called x in this particular equazion.If you have any questions , please contact me.

Yours sincerely,

Manos

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The high price of medicines is a source of major expense for those seniors in the United States who have to pay for these medici
Ilia_Sergeevich [38]

Answer:

4600-1.646\frac{800}{\sqrt{1800}}=4568.96    

4600+1.646\frac{800}{\sqrt{1800}}=4631.04    

We are confident at 90% that the true mean for the amount spent on medicines is between (4568.96 and 4631.04)

Step-by-step explanation:

Information given

\bar X=4600 represent the sample mean for the amount spent on medicines

\mu population mean

s=800 represent the sample standard deviation

n=1800 represent the sample size  

Solution

The confidence interval for the true population mean is given by:

\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}   (1)

We can calculate the degrees of freedom with:

df=n-1=1800-1=1799

We know that the Confidence level is 0.90 or 90%, the value of significance is \alpha=0.1 and \alpha/2 =0.05, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.05,1799)".And we see that t_{\alpha/2}=1.646

Replcing in the formula for the confidence interval we got:

4600-1.646\frac{800}{\sqrt{1800}}=4568.96    

4600+1.646\frac{800}{\sqrt{1800}}=4631.04    

We are confident at 90% that the true mean for the amount spent on medicines is between (4568.96 and 4631.04)

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Suppose B is a proper subset of C,
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Answer:

Maximum: 7

Minimum: 0

Step-by-step explanation:

A proper subset B of a set C, denoted B\subset C, is a subset that is strictly contained in C and so necessarily excludes at least one member of C.

This means that the number of elements in B must be at least 1 less than the number of elements in C. If the number of elements in C is 8, then the maximum number of elements in B can be 7.

The empty set is a proper subset of any nonempty set. Hence, the minimum number of elements in B can be 0.

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About what percent is 6,315 pounds of 20,00?
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