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givi [52]
3 years ago
11

PLEASE HELP ASAP! ten points given!

Mathematics
1 answer:
makvit [3.9K]3 years ago
5 0

Answer:

15°

Step-by-step explanation:

7x + 12 + 63 = 180

7x + 75 = 180

7x = 180 - 75

7x = 105

x = 15

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Which is the answers
Jlenok [28]

Answers:

  • -|-9| = -9
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6 0
3 years ago
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
What does 9! mean in math?
gogolik [260]

Answer:

9! means 9 factorial

Step-by-step explanation:

9 x 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1

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A book sold 37,900 copies in its first month of release. Suppose this represents 7.1% of the number of copies have been sold to
stira [4]
Hope you understand the working.
The answer rounded up is 2691

8 0
3 years ago
Multiply: (x + 3)(x – 4)
katovenus [111]
X^2 - X - 12 all you had to do is Factor
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