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3 years ago

TIMED NEED REAL ANSWERS FAST!!!!!

Mathematics

2 answers:

kari74 [83]3 years ago

6 0

2 inches or 6 inches

Anna71 [15]3 years ago

4 0

Answer:

Step-by-step explanation:

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Answer to the equation: <br> -3|a - 1| = -15

Charra [1.4K]

Hello,

-3|a-1|=-15
==>|a-1|=5
==>a-1=5 or -a+1=5
==>a=6 or a=-4
Sol={-4,6}

6 0

4 years ago

Simplify:<br> (5x-4)+(3-4x)

Zielflug [23.3K]

Answer:

x - 1

Step-by-step explanation:

combine like terms

(5x -4x) = x

(-4 + 3) = - 1

4 0

3 years ago

Read 2 more answers

Y=-2x2+12x-26

Elis [28]

Answer:

y = 12x - 22

Step-by-step explanation:

If we first write the equation in vertex form and we identify it (I think you meant to simplify y) we get y = 12x - 22 as your answer!

4 0

2 years ago

*WILL MARK BRAINLIEST!!!!!!*

Nuetrik [128]

Answer:

y=1

Step-by-step explanation:

The value of y where the function is undefined

7 0

4 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

5 0

2 years ago