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3 years ago

Help me pls Is it A B or C

Mathematics

2 answers:

Xelga [282]3 years ago

8 0

Answer:

Step-by-step explanation:

saul85 [17]3 years ago

5 0

Answer:

a. 80°

b. Corresponding Angles

Step-by-step explanation:

We are given lines with a certain amount of angles, we are then asked how much is angle A and which answer justifies question A.

We can see that in angle E, it is 80 degrees, look at a again and realize that they no different from eachother, their angle length is the exact same, therefore angle A is also 80°.

Let's define all the types given :

Corresponding - Two angles crossed by another line

Alternate - Angles that are in opposite positions

Vertically Opposite - Angles formed when two lines intersect.

Which would fit this description?

Corresponding Angles

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Sliva [168]

Answer:

The radius of a hexagon is called the apothem, which in this case is 15.

We need to know the side length which is found by the equation:

side length = apothem * 2 * (tan (180 / #sides))

side length = apothem * 2 * (tan (180 / 6))

side length = 15 * 2 * (tan (30 degrees))

side length = 30 * .57735

side length = 17.3205

We need the perimeter of the hexagon which equals the side length times six.

perimeter = 6 * 17.3205 = 103.923

Source: https://www.1728.org/polygon.htm

Step-by-step explanation:

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LenaWriter [7]

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3 years ago

A researcher is interested in estimating the savings account balance of customers at a large bank. She obtains the savings accou

a_sh-v [17]

Answer:

The 95% confidence interval for the true mean length of the shafts is ($3402.08, $4142.75).

Step-by-step explanation:

A (1 - <em>α</em>)% confidence interval for true mean (<em>μ</em>), when the population standard deviation is known is:

$CI=\bar x\pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$

If the population standard deviation is not known, then the confidence interval for true mean is:

$CI=\bar x\pm t_{\alpha/2, (n-1)}\frac{s}{\sqrt{n}}$

A 95% confidence interval for true mean is an interval estimate of the population mean. The interval has 0.95 probability of consisting the true value of the population mean.

It is provided that the 95% confidence interval for mean, based on a sample of size 30 is ($3402.08, $4142.75).

This interval implies that the true mean value is between $3402.08 and $4142.75 with 95% confidence.

Thus, the 95% confidence interval for the true mean length of the shafts is ($3402.08, $4142.75).

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4 years ago

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Group A has a larger median

Step-by-step explanation:

Group A : 0,1,2,3,3,3,4,4,5,5,7,7,8,9,9

Group B : 0,1,1,1,1,2,2,2,3,3,3,5,,6,6,7,8,8,9,9,9

You cross the first number out then you cross the last number. You continue that pattern until you have one or two digits left. If you have two digits left, you add them then divide by two. That the median. But, if you only have one digit, that number is the median.

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Step-by-step explanation:

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