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2 years ago

What is the measure of angle x, in degrees

Mathematics

1 answer:

ratelena [41]2 years ago

7 0

Option C ,

40 degrees

Because angle Z was 70 (isosceles triangle)

Then 180-140=40 degrees

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What percent of 64 is 8

steposvetlana [31]

n/100 * 64 = 8 n/100 = 8/64
n = 8*100/64 = 25/2 = 12.5
8 is 12.5% of 64 hope this helps:)

8 0

2 years ago

The plane that contains points C and T can also be named plane

kompoz [17]

Answer:

graph?

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

Mario is making dinner for 9 people. Mario buys 6 containers of soup. each container is 18 ounces. if everyone gets the same amo

Olenka [21]

First you multiply 6 and 18 to find the total servings: 6*18= 108. Then you divide 108 by 9 to see how many servings each person gets: 108/9= 12. Therefore, each person get 12 ounces of soup.

6 0

3 years ago

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At a college,4/5 of the students take an English class. Of these students, 5/6 take Composition. Which fraction of the students

Vikki [24]

Answer:

2/3

Step-by-step explanation:

given :

fraction of students that take English = 4/5 of all students

fraction of students that take composition

= 5/6 of the students that take English

= 5/6 of (4/5 of all students)

= 5/6 x 4/5

= (5 x 4) / (6 x 5)

= 20/30

= 2/3

5 0

2 years ago

The lengths of text messages are normally distributed with a population standard deviation of 6 characters and an unknown popula

ryzh [129]

Answer:

The 80% confidence interval for the population mean is between 28.32 characters and 31.68 characters.

Step-by-step explanation:

We have the standard deviation for the population, so we can use the normal distribution. If we had the standard deviation for the sample, we would have to use the t-distribution.

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.8}{2} = 0.1$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.5 = 0.9$ , so $z = 1.282$

Now, find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

$M = 1.282*\frac{6}{\sqrt{21}} = 1.68$

The lower end of the interval is the sample mean subtracted by M. So it is 30 - 1.68 = 28.32 characters.

The upper end of the interval is the sample mean added to M. So it is 30 + 1.68 = 31.68 characters.

The 80% confidence interval for the population mean is between 28.32 characters and 31.68 characters.

6 0

2 years ago