Mathematics: △DEF is shown below.Triangle DEFWhat is m∠DEF?

The sample standard deviation is 393.99Step-by-step explanation:The standard deviation of a sample can be calculated using the following formula:Where: Sample standart deviation Number of observations in the sample Mean value of the sampleand simbolizes the addition of the square of the difference between each observation and the mean value of the sample.Let s start calculating the mean value:Now, let s calculate the summation:So, now we can calculate the standart deviation:The sample standard deviation...

△DEF is shown below.Triangle DEFWhat is m∠DEF?

Ответ:

nickames202otpo7q

13.02.2022

Mathematics

m∠DEF = 50

Step-by-step explanation:

∠DEG = ∠GEF

3y + 4 = 5y - 10

subtract 4 from both sides

3y = 5y - 14

subtract 5y from both sides

-2y = -14

divide by -2

y = 7

Add 7 into the equations:

3y + 4 + 5y - 10

3(7) + 4 + 5(7) - 10

21 + 4 + 35 - 10

25 + 25

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Ответ:

blackops3318

25.07.2020

Mathematics

The sample standard deviation is 393.99

Step-by-step explanation:

The standard deviation of a sample can be calculated using the following formula:

$s=\sqrt[ ]{\frac{1}{N-1} \sum_{i=1}^{N}(x_{i}-{\displaystyle \textstyle {\bar {x}}}) ^{2} }$

Where:

Sample standart deviation

Number of observations in the sample

${\displaystyle \textstyle {\bar {x}}}=$ Mean value of the sample

and $\sum_{i=1}^{N}(x_{i}-{\displaystyle \textstyle {\bar {x}}}) ^{2} }$ simbolizes the addition of the square of the difference between each observation and the mean value of the sample.