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Akimi4 [234]
3 years ago
14

The value of y varies directly as the square of x and y=27 when x=9. Find the equation that represents this relationship. Report

the proportionality constant as a reduced fraction when necessary.
Mathematics
1 answer:
Alik [6]3 years ago
5 0

Answer:

im positive the answer is Y=1/3x2

Step-by-step explanation:

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A researcher surveyed 150 high school students and found that 68% played a musical insturment. What would be a reasonable range
maria [59]

Answer:

The reasonable range for the population mean is (61%, 75%).

Step-by-step explanation:

The interval estimate of a population parameter is an interval of values that consist of the values within which the true value of the parameter lies with a certain probability.

The mean of the sampling distribution of sample proportion is, \hat p.

One of the best interval estimate of population proportion is the 95% confidence interval for proportion,

CI=\hat p \pm z_{\alpha/2}\sqrt{\frac{\hat p(1-\hat p)}{n}}

Given:

n = 150

\hat p = 0.68

The critical value of <em>z</em> for 95% confidence level is:

z_{\alpha/2}=z_{0.05/2}=z_{0.025}=1.96

Compute the 95% confidence interval for proportion as follows:

CI=\hat p \pm z_{\alpha/2}\sqrt{\frac{\hat p(1-\hat p)}{n}}

     =0.68\pm1.96\sqrt{\frac{0.68(1-0.68)}{150}}\\\\=0.68\pm 0.0747\\\\=(0.6053, 0.7547)\\\\\approx (0.61, 0.75)

Thus, the reasonable range for the population mean is (61%, 75%).

5 0
3 years ago
Need help with 13 asap
Whitepunk [10]
I’m hoping you are talking about:
Factor -1/2 out of -1/2x + 6
If so then the answer is
-1/2(x-3)
4 0
3 years ago
NEED HELP ASAP WILL GIVE 100 PTS IN IT HAVE TO BE RIGHT AND I WILL GIVE BRAINIEST
AlladinOne [14]

Answer:

Step-by-step explanation:

(7^0/7^5)^1/5

= (1 / 7^5)^ 1/5

= (7^-5)^1/5

= 7^-1

= 1/7 is the correct answer.

5 0
3 years ago
Are there any integers between 0 and 1? Explain
zvonat [6]

Answer:

No

Step-by-step explanation:

Integers are whole numbers (not decimals or fractions) that are either <u>positive,</u> <u>negative</u>, or <u>zero</u>.

There are no whole numbers (integers) between 0 and 1.

4 0
3 years ago
Read 2 more answers
What is the constant in the expression 6a + 2b + 5?
goldenfox [79]

Answer:

5 is the constant since it doesn't have any variable with it

Step-by-step explanation:

Hope this helps!

8 0
3 years ago
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