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2 years ago

Hello I need help with this, I'll give u brainlist just please help me with this

Mathematics

2 answers:

Burka [1]2 years ago

4 0

A(-4,5)
B(-3,1)
C(-5,2)

A rotated(3,1)
B rotated(2,5)
C rotated(4,4)

g100num [7]2 years ago

3 0

Answer:

ABC= (-3,1), (-5,2), (-4, 5)

A'B'C= (3,1), (4,4), (2,5)

Step-by-step explanation:

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Which numer is rational and a real number, but not an integer

Amiraneli [1.4K]

Answer:

Step-by-step explanation:

sory if wrong

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8 0

3 years ago

In a clinical study of an allergy drug, 108 of the 200 subjects reported experiencing significant relief from their symptoms. Te

DochEvi [55]

Answer:

The decision is to not reject the null hypothesis.

At a significance level of 0.01, there is not enough evidence to support the claim that the proportion of all those using the drug that experience relief is significantly higher than 50% (P-value = 0.1443).

Step-by-step explanation:

This is a hypothesis test for a proportion.

The claim is that the proportion of all those using the drug that experience relief is significantly higher than 50%.

Then, the null and alternative hypothesis are:

$H_0: \pi=0.5\\\\H_a:\pi>0.5$

The significance level is 0.01.

The sample has a size n=200.

The sample proportion is p=0.54.

$p=X/n=108/200=0.54$

The standard error of the proportion is:

$\sigma_p=\sqrt{\dfrac{\pi(1-\pi)}{n}}=\sqrt{\dfrac{0.5*0.5}{200}}\\\\\\ \sigma_p=\sqrt{0.00125}=0.035$

Then, we can calculate the z-statistic as:

$z=\dfrac{p-\pi-0.5/n}{\sigma_p}=\dfrac{0.54-0.5-0.5/200}{0.035}=\dfrac{0.038}{0.035}=1.061$

This test is a right-tailed test, so the P-value for this test is calculated as:

$\text{P-value}=P(z>1.061)=0.1443$

As the P-value (0.1443) is greater than the significance level (0.01), the effect is not significant.

The null hypothesis failed to be rejected.

At a significance level of 0.01, there is not enough evidence to support the claim that the proportion of all those using the drug that experience relief is significantly higher than 50%.

6 0

4 years ago

A bus covers a distance of 2.45 km in 2 min. What is the speed of bus?

Vladimir [108]

Answer:

The speed of the bus is 74.242 kilometers per hour.

Step-by-step explanation:

Let suppose that bus runs at constant speed and that speed is measured in kilometers per hour. Then, the speed of the bus ( $v$ ), in kiometers per hour, is determined by following kinematic expression: