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Mariana [72]
3 years ago
9

PLEASE HELP ME I NEED THIS RIGHT NOW

Mathematics
2 answers:
puteri [66]3 years ago
7 0

 

(-4,0) is located on the x-axix because the coordinate y is zero.




pav-90 [236]3 years ago
6 0

Answer:

The answer is the second one

(-4, 0)


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Your teacher will report the mean and standard deviation of the sampling distribution created by the class.
sukhopar [10]

Answer:

\hat p = \frac{\sum_{i=1}^{40} \hat p_i}{40}

\hat p = 0.493

And the deviation is given by this formula:

s_{\hat p}= \frac{\sum_{i=1}^{40} (\hat p_i - \hat p)^2}{n-1}= 0.085

And as we can see the population proportion expected for the number of heads 0.5  is very close to the mean of the sampling distribution, the error is :

\% Error = \frac{0.5-0.493}{0.5}* 100 = 1.4\%

Step-by-step explanation:

Assuming the data on the figure attached. We ar assuming that this is a sampling distribution of sample proportions of heads in 40 flips of a coin.

As we can see we have the following values:

0.25, 0.35, 0.375,0.375, 0.40,0.40,0.40, 0.425,0.425,0.425, 0.45,0.45,0.45,0.45, 0.475,0.475,0.475, 0.475,0.475, 0.50,0.50,0.50, 0.525,0.525,0.525,0.525, 0.55,0.55,0.55,0.55,0.55, 0.575,0.575,0.575 0.575, 0.575, 0.60,0.60, 0.65,0.65

And we can calculate the sample proportion with the following formula:

\hat p = \frac{\sum_{i=1}^{40} \hat p_i}{40}

\hat p = 0.493

And the deviation is given by this formula:

s_{\hat p}= \frac{\sum_{i=1}^{40} (\hat p_i - \hat p)^2}{n-1}= 0.085

And as we can see the population proportion expected for the number of heads 0.5  is very close to the mean of the sampling distribution, the error is :

\% Error = \frac{0.5-0.493}{0.5}* 100 = 1.4\%

4 0
3 years ago
Jim is designing a seesaw for a children's park. The seesaw should make an angle of 30° with the ground, and the maximum height
Serjik [45]

Using the slope concept, it is found that the maximum length of the seesaw is of 1.73 meters.

<h3>What is a slope?</h3>

The slope is given by the <u>vertical change divided by the horizontal change</u>, and it's also the tangent of the angle of depression.

In this problem:

  • The vertical change is of 1 m.
  • The horizontal change is the length l.
  • The angle is of 30º.

Hence:

tan(30º) = 1/l

l = 1/tan(30º)

l = 1.73.

More can be learned about the slope concept at brainly.com/question/18090623

#SPJ1

3 0
2 years ago
in triangle GHJ, GH=8, HJ=10, and measure of angle G =120. To the nearest tenth what is measure of angle J?
seropon [69]
I believe your answer would be 240
but im not 100% sure
because a triangle equals up to 360 so 120-360= 240
3 0
4 years ago
Monica rode her bike 3 1/4 miles on monday.she rode 2 2/4 miles on tuesday how much farther did monica ride on minday than tuesd
ivanzaharov [21]

Answer:

3/4 miles

Step-by-step explanation:

3 1/4 as a mixed fraction => 13/4

2 2/4 as a mixed fraction => 10/4

13/4 - 10/4 = 3/4

<u>She rode 3/4 miles more on Monday than Tuesday.</u>

3 0
2 years ago
Which equation justifies why seven to the one third power equals the cube root of seven?
Rudiy27

The equation that  justifies why seven to the one third power equals the cube root of seven is seven to the one third power all raised to the third power equals seven to the one third times three power equals seven

<h3>How to solve an equation?</h3>

using indices law,

\sqrt[n]{x}  = x^{1 / n}

Therefore, let's justify

7^{1/3}  = \sqrt[3]{7}

Hence, the justification is as follows;

(7^{1 /3}) ^{3} =(7^{1/3})^{3}  = 7

Therefore, the justification of is that seven to the one third power all raised to the third power equals seven to the one third times three power equals seven

learn more on equation here: brainly.com/question/13426221

#SPJ1

4 0
2 years ago
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