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2 years ago

9

Hi! My teacher shows us a video and thats it, so I'm really struggling on our math test today. Can you help me answer this quest

ion? Thank you :)

1 answer:

zzz [600]2 years ago

7 0

Answer:

A and E

Step-by-step explanation:

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Will Mark Brainliest !!

NeX [460]

Answer:

y=2/5 - 1/5

explanation:

6 0

3 years ago

Can someone help me solve this problem please! I'd really appreciate it!!

Helga [31]

X=112
Y=90
Explanation: Y is 90 because you can see that it is a right angle! To find X you can find the 3rd angle that is in the triangle with Y in it (which is 68) and then because X is supplementary to that angle we just found you can do 180-68 which is 112!

3 0

2 years ago

Read 2 more answers

A large on-demand, video streaming company is designing a large-scale survey to determine the mean amount of time corporate exec

Firdavs [7]

Answer:

554 executives should be surveyed.

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:

$\alpha = \frac{1 - 0.95}{2} = 0.025$

Now, we have to find z in the Z-table as such z has a p-value of $1 - \alpha$ .

That is z with a pvalue of $1 - 0.025 = 0.975$ , so Z = 1.96.

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.

Standard deviation of 3 hours.

This means that $\sigma = 3$

The 95% level of confidence is to be used. How many executives should be surveyed?

n executives should be surveyed, and n is found with $M = 0.25$ . So

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

$0.25 = 1.96\frac{3}{\sqrt{n}}$

$0.25\sqrt{n} = 1.96*3$

$\sqrt{n} = \frac{1.96*3}{0.25}$

$(\sqrt{n})^2 = (\frac{1.96*3}{0.25})^2$

$n = 553.2$

Rounding up:

554 executives should be surveyed.

8 0

3 years ago

Write 6^7 + 6^5 + 11 in base six. Use the digits 0, 1, 2, 3, 4, 5

Zielflug [23.3K]

Answer:

Sorry I don't remember the answer

6 0

3 years ago

Mr. Brown owned a house, which he rented for $60 a month. The house was assessed at $9000. In 1975 the rate of taxation was incr

sergiy2304 [10]

Answer:

Raised by $2.25/month

Step-by-step explanation:

9000/1000=9

28-25=3

3*9=27

27/12=$2.25

7 0

3 years ago