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katovenus [111]
2 years ago
13

Plzz help ASAPPPP i need answers right now!!1

Mathematics
1 answer:
alex41 [277]2 years ago
8 0

Answer:

ydyeheuuru u ieuegeoeororpe

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Which inequality is equivalent to this one? y-85-2 y-8+82-2+8 oy- 8+8 ​
vladimir2022 [97]

Answer:

The answer is the forth one , Y-8+2⩽-2+2

5 0
3 years ago
Which statement makes the open sentence true 2x-7= -1
oee [108]

Answer:

3

Step-by-step explanation:

if you plug in 3 for x, it becomes 2(3)-7=-1

then 6-7=-1

-1=-1

6 0
3 years ago
Find the indicated sum for each sequence. S9 of –9, 36, –144, 576, ...
gogolik [260]

This is a geometric sequence with a common ratio of -4:

-9*-4=36

36*-4=-144

-144*-4=576

Thus, the 9th term would be equal to:

(-4)^5*576 which is -589824

The exponent 5 comes from the fact that 4 terms have already been displayed and we need 9-4 more terms to get to the 9th term. Since we are multiplying by -4 only, the 5 remains an exponent

5 0
3 years ago
The General Social Survey asked the question: "For how many days during the past30 days was your mental health, which includes s
serg [7]

Answer:

a) For this case we can conclude that we are 95% confident that the true mean for the variable of interest is between 3.4 and 4.24 days in the US population.

b) The 95% confident means that if we select 100 different samples and calculate the 95% confidence interval for each sample selected, then we will have approximately 95 out of 100 confidence intervals will contain the true mean for the parameter of interest.

c) If we have the same info but we want more confidence that implies that the confidence interval would be wider, since the margin of error increase with more confidence.

d) Assuming that we have the same confidence level and the value for the deviation not changes. If we see if we decrease the sample size, then the margin of error would be lower since the original sample size was 1151. So then if we use 500 Americans we would have a lower value for the margin of error for this new interval. And then our confidence interval would smaller than the original.  

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".  

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

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

For the 95% confidence interval the value of \alpha=1-0.95=0.05 and \alpha/2=0.025, with that value we can find the quantile required for the interval in the normal standard distribution.

z_{\alpha/2}=1.96

The confidence interval after apply the formulas was (3.40 ,4.24)

Part a

For this case we can conclude that we are 95% confident that the true mean for the variable of interest is between 3.4 and 4.24 days in the US population.

Part b

The 95% confident means that if we select 100 different samples and calculate the 95% confidence interval for each sample selected, then we will have approximately 95 out of 100 confidence intervals will contain the true mean for the parameter of interest.

Part c

If we have the same info but we want more confidence that implies that the confidence interval would be wider, since the margin of erroe increase with more confidence, because the critical value increase.

Part d

We need to take in count that the margin of error is given by:

ME=t_{\alpha/2}\frac{s}{\sqrt{n}}

Assuming that we have the same confidence level and the value for the deviation s not changes. If we see if we decrease the sample size, then the margin of error would be lower since the original sample size was 1151. So then if we use 500 Americans we would have a lower value for the margin of error for this new interval. And then our confidence interval would smaller than the original.  

4 0
3 years ago
i need #5. it isn’t super complicated but i don’t know how to do it. also stressed out with other work. can somebody please help
m_a_m_a [10]

Answer: y= 6x +14 and you would be able to feed 6 people cause when the graph starts the first 4 already counted for and since 6 is needed for each addition person that would mean 2 more people can be fed cause 26-14=12 and 12 divided by 6 is 2

Slope intercept form is y= m(x) + b

3 0
3 years ago
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