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Shkiper50 [21]
3 years ago
6

Which of these could be the length of sides of right triangle ABC?

Mathematics
1 answer:
Anna007 [38]3 years ago
4 0

Answer:

C

Step-by-step explanation:

5*5+12*12=13*13

25+144=169

169=169

Hope this helps you!

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Which phrase describes the algebraic expression 3 x minus 4?
zaharov [31]

Answer:

3x - 4 = -12

Step-by-step explanation:

7 0
3 years ago
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What is the length of the longest side of a triangle that has vertices at (4, -2), (-4,-2),
BaLLatris [955]
It should be C I am not sure
6 0
3 years ago
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In an examination of purchasing patterns of shoppers, a sample of 16 shoppers revealed that they spent, on average, $54 per hour
Lesechka [4]

Answer:

54-1.64\frac{21}{\sqrt{16}}=45.39    

54 +1.64\frac{21}{\sqrt{16}}=62.61    

So on this case the 90% confidence interval would be given by (45.39;62.61)    

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=54 represent the sample mean  

\mu population mean (variable of interest)

\sigma=21 represent the sample standard deviation

n=16 represent the sample size  

Solution to the problem

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

\bar X \pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}}   (1)

Since the Confidence is 0.90 or 90%, the value of \alpha=1-0.9=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: "=-NORM.INV(0.05,0,1)".And we see that z_{\alpha/2}=1.64

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

54-1.64\frac{21}{\sqrt{16}}=45.39    

54 +1.64\frac{21}{\sqrt{16}}=62.61    

So on this case the 90% confidence interval would be given by (45.39;62.61)    

4 0
3 years ago
What is the graph of the function? <br><br> f(x) = 2x2
spayn [35]
Let's plug in a few points to see which graph belongs to the function f(x) = 2x^2

Let's say x =0, let's find y!
2(0)^2 = 2(0) = 0

So one point on our line is (0.0)

Just finding this point right here eliminates 3 of the answer choices. Your answer is the graph that goes through the point (0,0)

For your added convenience, I have attached the graph. :)

5 0
3 years ago
If s ( x ) = 2 - x² and t ( x ) = 3x, what is s ( t ( -7 ) )?
ankoles [38]

Answer:

s (t (-7))=?

Step-by-step explana

s (t (-7))=  -7s t

5 0
3 years ago
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