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AnnZ [28]
3 years ago
13

Help me with math earn 10 points

Mathematics
2 answers:
gayaneshka [121]3 years ago
8 0

Answer:

Option number 1

Step-by-step explanation

shtirl [24]3 years ago
3 0

Answer: option 3

Step-by-step explanation:

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Write the number below as a fraction in its simplest form 0.673 the 7 and 3 are recurring
wlad13 [49]
Let x=0.6737373...(1)
10x=6.737373...(2)
1000 x=673.737373...(3)
(3)-(2) gives 
990x=667
x=667/990
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3 years ago
Question 1 ) a divided by 5 +7 =15 <br><br> a=
Ghella [55]
The correct answer is a = 40.
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8 0
3 years ago
Dora calculated the mean absolute deviation for the data set 35, 16, 23, 42, and 19. Her work is shown below.
Crazy boy [7]

Answer:

The calculation in step 3 is wrong

Step-by-step explanation:

1) The mean of a dataset is given by the sum of the values of the dataset divided by the number of values.

In this problem, the dataset is

35, 16, 23, 42, 19

And the number of data is

N = 5

So the mean is

\bar x=\frac{35+16+23+42+19}{5}=27

So, step 1 is correct.

2)

The absolute deviation of a value in the dataset is the absolute value of its difference from the mean value:

\sigma_i = |x_i-\bar x|

Since here the mean value is

\bar x=27

Then for each of the values in this dataset, we have:

\sigma_{1}=|35-27|=8\\\sigma_{2}=|16-27|=11\\\sigma_{3}=|23-27|=4\\\sigma_{4}=|42-27|=15\\\sigma_{5}=|19-27|=8

So calculations in step 2 are also correct.

3)

The mean absolute deviation is given by the sum of the absolute deviations for each data divided by the number of values in the dataset.

Therefore in this problem, it is:

\bar \sigma = \frac{\sum \sigma_i}{N}=\frac{8+11+4+15+8}{5}=9.2

While the result reported by Dora is 9.5: therefore, this step is not correct.

5 0
3 years ago
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What is the answer to question and it has to be right I’ll mark as th brainliest !!!
Makovka662 [10]

Answer:

Hi~Luv,

Here's~your~answer!

The~third~graph~is~the~correct~answer!

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Have~an~awesome~day~ahead!

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3 0
3 years ago
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On a test that has a normal distribution, a score of 49 falls two standard deviations
julsineya [31]

Answer:

57   mean

Step-by-step explanation:

x = mean

(x - 49 )  = 2 ( 61 -x)

x = 57

5 0
2 years ago
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