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andrey2020 [161]
2 years ago
7

5. y is directly proportional to x. If y = 20 when x = 2.5, find y when x=3

Mathematics
1 answer:
nignag [31]2 years ago
6 0

Answer:

y=24

Step-by-step explanation:

you calculate step by step until you get the results

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The tip percentage at a restaurant has a mean value of 18% and a standard deviation of 6%.
irakobra [83]

Answer:

a. 0.8366

b. No

Step-by-step explanation:

We will use the central limit theorem which can be applied to a random sample from any distribution as long as the mean and the variance are both finite and the sample size is large (the sample size n should be greater than 30). Here we have that the tip percentage at the restaurant has a mean value of 18% and a standard deviation of 6%, then because of the central limit theorem, we know that the sample mean tip percentage is approximately normally distributed with mean 18% and standard deviation 6/\sqrt{40}%=0.9487%.

a. The z-score related to 16% is given by (16-18)/0.9487 = -2.1081 and the z-score related to 19% is given by (19-18)/0.9487 = 1.0541. We are looking for P(16 < \bar{X} < 19) = P(-2.1081 < Z < 1.0541) = P(Z < 1.0541)- P(Z < -2.1081) = 0.8540 - 0.0175 = 0.8366

b. If the sample size had been 15 rather than 40, then, the probability requested in part (a) could not be calculated from the given information, this because the central limit theorem only applies when the sample size is large, for example n > 30.

8 0
3 years ago
Nud,es for yall some yall desperate so here
Yuri [45]

Answer:

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
What’s the distance between the points (-11, -16) and (20, -16)
pishuonlain [190]

Answer:

Sorry no one has answered for so long, by now you probably already answered but anyway, the answer would be 31.

Step-by-step explanation:

Because the y axes values are the same, we just need to figure out how far they are on the x axes. Which is indeed 31.

5 0
3 years ago
Can someone answer this please? Thanks! :)
Wittaler [7]
The Correct Answer is : 4x - 4 * 2

Hope This Helps :)

If it does please give brainliest answer xD
7 0
3 years ago
Read 2 more answers
If you know the rest of the answers pls help me
netineya [11]

Answer:

.45 times 6= 2.7

29 times 8 =232

.62 times 19 = 11.78

8.7 times 12=104.4

11.9 times 4 = 47.6

Step-by-step explanation:

3 0
2 years ago
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