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belka [17]
3 years ago
9

Y and x have a proportional relationship, and y = 25 when x = 60.

Mathematics
2 answers:
diamong [38]3 years ago
8 0

Answer:

This equation can be solved by using y = kx.  

Since y = 25 when x = 60,

25 = 60k and if we solve for k then k= 5/12.

That means the equation we're using is

y = (5/12)x.

Plug in y = 30 and you get

30 = (5/12)x

Solve for x

30 * (12/5) = x

360/5 = x

x = 72

34kurt3 years ago
8 0
72 is the answer to this problem
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g You are planning an opinion study and are considering taking an SRS of either 200 or 600 people. Explain how the sampling dist
Katen [24]

Answer:

By the Central Limit Theorem, both would be approximately normal and have the same mean. The difference is in the standard deviation, since as the sample size increases, the standard deviation decreases. So the SRS of 600 would have a smaller standard deviation than the SRS of 200.

Step-by-step explanation:

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

For the sampling distribution of size n of a sample proportion p, the mean is p and the standard deviation is s = \sqrt{\frac{p(1-p)}{n}}

Differences between SRS of 200 and of 600

By the Central Limit Theorem, both would be approximately normal and have the same mean. The difference is in the standard deviation, since as the sample size increases, the standard deviation decreases. So the SRS of 600 would have a smaller standard deviation than the SRS of 200.

6 0
3 years ago
I need help with finding the equilibrium prices for each one in the table below. I can't seem to understand how to do it. Please
Neporo4naja [7]

Answer:

it might be $0.85 19 i think not 100% sure plz doint report me

Step-by-step explanation:

3 0
3 years ago
Find the value of Z in the following equation: 8Z = 64.<br> a. 72<br> B. 8<br> C. 512<br> D. 56
VLD [36.1K]
8Z = 64

Divide both sides by 8.

8Z/8 = 64/8

Z = 64/8

Z = 8


Your final answer is B. 8.
6 0
3 years ago
Read 2 more answers
PLEASE HELP I WILL GIVE BRAINILEST
stira [4]

for A you should take each plotted point and change the sign of the x values. for example (-1,3) should become (1,3) and (-4,4) should become (4,4)

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for C take every x value and subtract 2. (-1,3) should become (-3,3)

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5 0
3 years ago
Help please!  I will mark brainliest answer! 
maxonik [38]
Double bar graph, double line graph, scatter plot. 
3 0
3 years ago
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