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Olenka [21]
3 years ago
7

Determine if each of the figures given is a parallelogram.

Mathematics
2 answers:
Harrizon [31]3 years ago
7 0

the left one is not a parallelogram

the right one is a parallelogram, you see from all 90° angles.


34kurt3 years ago
5 0

The first is a trapeze, and the second is a parallelogram, but because it has 4 right angles, it is a special case of parallelograms, and its called a rectangle.

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Answer:

y = 2/5x + 5

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

Answer:

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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
Will give brainly if correct (hs gemotry)
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Scarlet is leaning a 12 foot ladder. When you lean a 12 foot ladder, it is s slanted so we will make 12 our slanted side or hypotenuse. It makes a 80 degree angle after contact with the ground so it will be on the lowest angle on the right. We are asked to find the vertical side or how high up the ground is. We are asked to a angle that is opposite of the given angle which is x .. And we are also given the hypotenuse. We are going to use sin using our SOHCAHTOA

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IF ROUNDED TO NEAREST HUNDRETH, 11.82

5 0
2 years ago
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