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Elza [17]
3 years ago
15

What is the relationship between 4x + 6y = 12 and 2x + 3y = 6 ?

Mathematics
2 answers:
bixtya [17]3 years ago
6 0
I think that relation is overlapping or coincident line
mash [69]3 years ago
4 0
The second question is the same as the first one but halved

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I don’t know how to do this math problem
Svetach [21]

Answer:

I'll help

Step-by-step explanation:

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3 0
3 years ago
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What is the formula for a confidence interval?
ikadub [295]

Answer:

a) The formula is given by mean \pm the margin of error. Where the margin of error is the product between the critical value from the normal standard distribution at the confidence level selected and the standard deviation for the sample mean.

b) \bar X \pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}}

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".  

The margin of error is the range of values below and above the sample statistic in a confidence interval.  

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".  

If the distribution for X is normal or if the sample size is large enough we know that the distribution for the sample mean \bar X is given by:

\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})

Part a

The formula is given by mean \pm the margin of error. Where the margin of error is the product between the critical value from the normal standard distribution at the confidence level selected and the standard deviation for the sample mean.

Part b

The confidence interval for the mean is given by the following formula:  

\bar X \pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}}

5 0
3 years ago
Is 2/x + y/4 = 3/2 linear?
Makovka662 [10]

Answer:

No

Step-by-step explanation:

6 0
3 years ago
How do you find the x and y intercepts of 5x+4y=-20
irina1246 [14]

To find the y intercept, you cover x and it's coefficient and then divide -20 by 4 to get -5. To find the x intercept, you cover y and it's coefficient and divide 5 by -20 to get -4. So, x = -4 and y= -5


8 0
3 years ago
(3-6i)-(4+2i)-(-7+i)=
tamaranim1 [39]
<span>(3-6i)-(4+2i)-(-7+i)

Answer is = 6-9i</span>
5 0
3 years ago
Read 2 more answers
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