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3 years ago

Tell whether the angles are adjacent or vertical. Then find the value of x.

Mathematics

1 answer:

Hatshy [7]3 years ago

4 0

Answer:

Step-by-step explanation:

x=360-80=280°

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Drag the correct number of pieces to show how to find the area of the shaded figure in two different ways. Pieces can be rotated

AURORKA [14]

Answer:forgot to add sin a = -5

Step-by-step explanation:

3 0

3 years ago

△ XYZ∼ △ DEF, YZ is 10 meters, XZ is 15 meters, and EF is 8 meters. What is DF?

Gala2k [10]

Im not for sure on this but i would say DF is 13

7 0

3 years ago

Read 2 more answers

a bag contains colored gumdrops 5 are cherry 3 are strawberry 2 are grape. a gumdrop will be randomly selected from the bag what

weqwewe [10]

Answer:

probablity of grapes = 0.2

Step-by-step explanation:

here's the solution : -

probablity of grapes =

$\frac{number \: of \: grapes}{total \: fruits}$

=》

$\frac{2}{2 + 3 + 5}$

=》

$\frac{2}{10}$

=》

$0.2$

6 0

3 years ago

Use the sample data and confidence level to construct the confidence interval estimate of the population proportion p. n equals

Alekssandra [29.7K]

Answer:

(0.767,0.833)

Step-by-step explanation:

The 95% confidence interval for population proportion p can be computed as

$p-z_{\frac{\alpha }{2} } \sqrt{\frac{pq}{n} }$

The z-value associated with 95% confidence level is 1.96.

whereas p=x/n

We are given that x=440 and n=550.

p=440/550=0.8

$0.8-1.96\sqrt{\frac{0.8(0.2)}{550} }$

$0.8-1.96\sqrt{\frac{0.16}{550} }$

$0.8-1.96\sqrt{0.00029 }$

$0.8-1.96(0.01706)$

$0.8-0.03343$

$0.76657$

Thus, the required confidence interval is

0.767<P<0.833 (rounded to 3 decimal places)

Hence, we are 95% confident that our true population proportion will lie in the interval (0.767,0.833)

3 0

3 years ago

What does standard deviation mean?

Sveta_85 [38]

Standard deviation is: It is a measure of how spread out numbers are. It is the square root of the Variance, and the Variance is the average of the squared differences from the Mean.

For example: To find the standard deviation, you have to add up all the numbers in the data set, then divide by how many numbers there are, and that will get you your answer.

Example, Say your data set is: 9, 2, 5, 4, 12, 7, 8, 11, 9, 3, 7, 4, 12, 5, 4, 10, 9, 6, 9, 4.

The Mean is: 9 + 2 + 5 + 4 + 12 + 7 + 8 + 11 + 9 + 3 + 7 + 4 + 12 + 5 + 4 + 10+ 9 + 6 + 9 + 4. Over 20. That equals: 104 over 20 = 7.

So, the Standard Variance and Mean is: 7 for this problem.

Hope I helped!

- Debbie

4 0

3 years ago