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3 years ago

Three interior angles of a quadrilateral measures 55,117,and 120 what is the measure of the fourth interior angle?

Mathematics

2 answers:

marissa [1.9K]3 years ago

6 0

Answer:

A 68

Step-by-step explanation:

Bec I’m smart I think

Goshia [24]3 years ago

4 0

Answer:

I think it is 8 because all the angles should measure up to 360

Step-by-step explanation:

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The weights of 67 randomly selected axles were found to have a variance of 3.85. Construct the 80% confidence interval for the p

VLD [36.1K]

Answer:

$3.13$

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 67

Variance = 3.85

We have to find 80% confidence interval for the population variance of the weights.

Degree of freedom = 67 - 1 = 66

Level of significance = 0.2

Chi square critical value for lower tail =

$\chi^2_{1-\frac{\alpha}{2}}= 51.770$

Chi square critical value for upper tail =

$\chi^2_{\frac{\alpha}{2}}= 81.085$

80% confidence interval:

$\dfrac{(n-1)S^2}{\chi^2_{\frac{\alpha}{2}}} < \sigma^2 < \dfrac{(n-1)S^2}{\chi^2_{1-\frac{\alpha}{2}}}$

Putting values, we get,

$=\dfrac{(67-1)3.85}{81.085} < \sigma^2 < \dfrac{(67-1)3.85}{51.770}\\\\=3.13$

Thus, (3.13,4.91) is the required 80% confidence interval for the population variance of the weights.

8 0

3 years ago

Use the drop-down menus to complete the statements about Euler's life after he lost his sight. After the cataract took Euler's s

Sav [38]

Answer: after the cataract took Euler’s sight he wrote more books and articles. He wrote 450 books after he lost his eye sight.

Step-by-step explanation:

Got it correct on edge.

5 0

3 years ago

Read 2 more answers

Pls helppp due soon!!

FrozenT [24]

Answer:

I think the answer is B

Step-by-step explanation:

Sorry if it's wrong

4 0

3 years ago

Read 2 more answers

Two sides of a triangle measure 8cm and 12cm which can not be the measure of the third side?

seraphim [82]

4cm, as if two of the sides add up to be the same length as the first side then the triangle would be a straight line.

8 0

3 years ago

If x^2 = a and a > 0. what is x?

7nadin3 [17]

$\\ \sf\longmapsto x^2=a$

$\\ \sf\longmapsto x=\sqrt{a}$

Now if a be 1,2,3,4....

$\\ \sf\longmapsto x=\sqrt{1}=1$

$\\ \sf\longmapsto x=\sqrt{2}$

$\\ \sf\longmapsto x=\sqrt{3}$

$\\ \sf\longmapsto x=\sqrt{4}=2$

And so on

6 0

3 years ago