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DiKsa [7]
2 years ago
5

Graph the function: f(x) = -2 for x < 1. ASAP!! YOU CAN USE A ONLINE TOOL TO GRAPH AND TAKE SCREENSHOT (I would but i dont kn

ow how to work them)
Mathematics
1 answer:
chubhunter [2.5K]2 years ago
7 0

Answer:

please see attachhment

Step-by-step explanation:

Hope this helps!

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Prove using coordinate geometry. Prove that the points (0,0), (4,0), (4, 4) and (0, 4) create a rhombus and then show that the m
BaLLatris [955]

Answer:

IDK

Step-by-step explanation:

IDK

5 0
3 years ago
Suppose a baker claims that the average bread height is more than 15cm. Several of this customers do not believe him. To persuad
laila [671]

Answer:

17-2.262\frac{1.9}{\sqrt{10}}=15.641    

17+2.262\frac{1.9}{\sqrt{10}}=18.359    

So on this case the 95% confidence interval would be given by (15.641;18.359)    

And since the lower limit for the confidence interval is higher than 15 we can conclude that at 5% of significance the true mean is higher than 15 cm

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".

\bar X=17 represent the sample mean

\mu population mean (variable of interest)

s=1.9 represent the sample standard deviation

n=10 represent the sample size  

Confidence interval

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

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

In order to calculate the critical value t_{\alpha/2} we need to find first the degrees of freedom, given by:

df=n-1=10-1=9

Since the Confidence is 0.95 or 95%, the value of \alpha=0.05 and \alpha/2 =0.025, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.025,9)".And we see that t_{\alpha/2}=2.262

Now we have everything in order to replace into formula (1):

17-2.262\frac{1.9}{\sqrt{10}}=15.641    

17+2.262\frac{1.9}{\sqrt{10}}=18.359    

So on this case the 95% confidence interval would be given by (15.641;18.359)    

And since the lower limit for the confidence interval is higher than 15 we can conclude that at 5% of significance the true mean is higher than 15 cm

4 0
3 years ago
Will mark brainliest! The triangles shown below must be congruent, true or false
olchik [2.2K]
True because they have the same size angles
8 0
2 years ago
Read 2 more answers
Please help!! Will give brainliest and more points! (Click on the photo)
Marizza181 [45]

Answer: The answer is 25.

7 0
3 years ago
Which graph shows the solution set for 2 x + 3 greater-than negative 9?
Neporo4naja [7]

Answer:

You didn't include any graphs.

Step-by-step explanation:

3 0
2 years ago
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