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hjlf
2 years ago
13

What is the area of the regular polygon shown below?

Mathematics
1 answer:
Alexxx [7]2 years ago
7 0
8 times 8 so 64 is your answer :) hope this helps
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The equation of a line is -6x - 2y = -18. What is the x-intercept & y-intercept of the line?
WARRIOR [948]

Answer: y int: (0,9)    x int: (3,0)

Step-by-step explanation:

In slope intercept form, the equation is y=-3x+9. In the formula y=mx+b, we know b is the y intercept, so our y int. is 9. To find our x intercept, we set y=0. So, 0=-3x+9=>3x=9=>x=3

5 0
3 years ago
The population standard deviation for the typing speeds for secretaries is 4 words per minute. If we want to be 90% confident th
Oksana_A [137]

Answer:

The minimum sample size that should be taken is 62.

Step-by-step explanation:

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

\alpha = \frac{1-0.9}{2} = 0.05

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 1-0.05 = 0.95, so z = 1.645

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.

If we want to be 90% confident that the sample mean is within 1 word per minute of the true population mean, what is the minimum sample size that should be taken

This is n when M = 1, \sigma = 4. So

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

1 = 1.96*\frac{4}{\sqrt{n}}

\sqrt{n} = 4*1.96

(\sqrt{n})^{2} = (4*1.96)^{2}

n = 61.5

The minimum sample size that should be taken is 62.

8 0
3 years ago
Please find the value of x please
marin [14]
Answer is 7

Step by step explanation

3x+159=180
3x=180-159=21
x=7
5 0
2 years ago
Help me please I need help ASAP
AysviL [449]
The temperature at 10 pm is -3 degrees
3 0
3 years ago
One year, the population of a city was 225,000. Several years later it was 236,250. Find the percent increase.
vampirchik [111]

Based on the information given the percentage increase is 5%.

<h3>Percentage increase</h3>

Using this formula

Percentage increase=Population several years later-Population for year/Population for one year×100%

Let plug in the formula

Percentage increase=236,360-225,000/225,000×100

Percentage increase=5%

Inconclusion  the percentage increase is 5%.

Learn more about percentage increase here:brainly.com/question/11360390

4 0
2 years ago
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