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3 years ago

PLEASE HELP ASAP. I NEED TO KNOW NOW

Mathematics

2 answers:

Vitek1552 [10]3 years ago

8 0

Answer:

the answer is x1 = -4- square root of 23 x2= -4+ square root of 23

seraphim [82]3 years ago

3 0

Square root of 23 so that

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How to solve this linear equation 2/3y=-12

Alenkinab [10]

Well you are solving for Y so you have to get y by itself. So in order to do that you must multiply both sides by 3/2. You do this because you need to get 2/3 on the other side. So just multiply -12 and 2/3 and you'll get y=-18. You can check this by plugging -18 into your original equation. So 2/3y=-12 will become 2/3(-18)=-12. If the you got the correct answer then you should get -12=-12.

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3 years ago

About 30% of the population cannot detect any odor when they sniff the steroid androstenone, but they can become sensitive to it

iris [78.8K]

Using the z-distribution, as we are working with a proportion, it is found that there is enough evidence to conclude that the proportion is different of 50%.

<h3>What are the hypothesis tested?</h3>

At the null hypothesis, it is tested if the proportion is of 0.5, that is:

$H_0: p = 0.5$

At the alternative hypothesis, it is tested if the proportion is different of 0.5, that is:

$H_1: p \neq 0.5$ .

<h3>What is the test statistic?</h3>

The test statistic is given by:

$z = \frac{\overline{p} - p}{\sqrt{\frac{p(1-p)}{n}}}$

In which:

$\overline{p}$ is the sample proportion.

p is the proportion tested at the null hypothesis.

n is the sample size.

In this problem, the parameters are:

$p = 0.5, n = 12, \overline{p} = \frac{10}{12} = 0.8333$

Then, the value of the test statistic is as follows:

$z = \frac{\overline{p} - p}{\sqrt{\frac{p(1-p)}{n}}}$

$z = \frac{0.8333 - 0.5}{\sqrt{\frac{0.5(0.5)}{12}}}$

$z = 2.31$

<h3>What is the decision?</h3>

Considering a <em>two-tailed test</em>, as we are testing if the proportion is different of a value, with a <em>significance level of 0.05</em>, the critical value is of $|z^{\ast} = 1.96$ .

Since the absolute value of the test statistic is greater than the critical value for the two-tailed test, it is found that there is enough evidence to conclude that the proportion of participants that had improved androstenone-detection accuracy is different of 50%.

More can be learned about the z-distribution at brainly.com/question/26454209

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2 years ago

Please help<br>........

o-na [289]

Answer:

1. monomial

2. Binomial

3. polynomial

4.binomial

5 trinomial

6 binomial

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3 years ago

If you have two dots and one line in the middle

Art [367]

That is a line segment

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3 years ago

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Scientific understandings can change as new information is discovered. Which is an example of how scientific understandings have

Tresset [83]

Answer:

E. People once thought animals were individually create by some superior.

But the solid creation of theory of origin of species by the naturalist Charles Darwin demonstrated a different theory.

Step-by-step explanation:

Before Charles Darwin several scientists were discussing the hypothesis of a theory of evolution. But it was Darwin whom put together all the information with reliable explanation and correlation between animal specialization and environment accordyinly with time.

He spent almost five years on board the ship HMS Beagle, crossing several continents, starting with South America. From there, he returned with dozens of specimens of living species, illustrations and fossils. Those specimens helped Darwin in his discoveries which originated the book On the Origin of Species published in 1859.

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3 years ago