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3 years ago

Can i get help on 23?

Mathematics

2 answers:

Likurg_2 [28]3 years ago

5 0

Answer:

ngle A=77

Angle B=103

Step-by-step explanation:

∠A+∠B=180 ( supplementary angles)

3/8 x +50+x+31=180

3/8 x+x=180-81

11/8 x=99

11x=99*8

x=(99*8)/11 =72

Angle A= 3/8 (72)+50

Angle A=27+50=77

Angle B= 72+31=103

aleksandrvk [35]3 years ago

3 0

Answer:

m<a = 77

m<b= 103

Step-by-step explanation:

m<a+m<b = 180(supplementary angles)

3x/8+50+x+31=180

3x/8+x+81=180

(3x+8x)/8=180-81

3x+8x=99*8

11x=792

x=792/11

x=72

now

m<a=3x/8+50

=(3*72)/8+50

=77

m<b=x+31

=72+31

=103

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3 years ago

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3 years ago

Given the sample 4, −2, −6, 19, 6, add one more sample value that will neither change the mean nor the variance. Round to two de

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Cannot create sample

Step-by-step explanation:

We are given the following in the question:

4, -2, -6, 19, 6

Formula:

$\text{Variance} = \displaystyle\frac{\sum (x_i -\bar{x})^2}{n-1}$

where $x_i$ are data points, $\bar{x}$ is the mean and n is the number of observations.

$Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}$

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Thus, the variance of new sample changes.

Thus, it is not possible to create a sample.

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3 years ago