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2 years ago

I really need help I don’t understand this that well

Mathematics

1 answer:

marin [14]2 years ago

6 0

Answer:

They give you the answer just keep going until you get the same answer or use the inverse of what they did

Step-by-step explanation:

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HURRY I NEED THE ANSWER NOW

lutik1710 [3]

Answer: The correct answer is 5

5 0

2 years ago

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A test for syphilis gives a positive result with probability 0.98 when tested on a person who has the disease. The test gives a

mestny [16]

Answer:

The probability that an individual has the disease and has a positive test result is:

9.8%.

Step-by-step explanation:

Probability of a true positive result for a test of syphilis = 0.98 or 98%

Probability of a false negative result for a test of syphilis = 0.02 or 2% (100 - 98)

Probability of a true negative result for a test of syphilis = 0.9 or 90%

Probability of a false negative result for a test of syphilis = 0.1 or 10% (100 - 90)

Therefore, the probability that an individual has the disease and has a positive test result = 0.98 * 0.1 = 0.098 = 9.8%

3 0

2 years ago

In an effort to improve scores on college-entrance exams, the principal at a large high school chooses 35 students

denpristay [2]

Using the t-distribution, it is found that the test statistic for the hypotheses test is given by:

$t = \frac{-1.75 - 0}{\frac{7.12}{\sqrt{35}}}$

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

At the null hypotheses, it i tested if the mean difference remains the same, that is:

$H_0: \mu = 0$

At the alternative hypotheses, it is tested if it has decreased, hence:

$H_a: \mu < 0$ .

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

The test statistic is given by:

$t = \frac{\overline{x} - \mu}{\frac{s}{\sqrt{n}}}$

The parameters are:

$\overline{x}$ is the sample mean.

$\mu$ is the value tested at the null hypothesis.

s is the standard deviation of the sample.

n is the sample size.

The parameters are given as follows:

$\overline{x} = -1.75, s = 7.12, n = 35$ .

Hence the test statistic is given by:

$t = \frac{\overline{x} - \mu}{\frac{s}{\sqrt{n}}}$

$t = \frac{-1.75 - 0}{\frac{7.12}{\sqrt{35}}}$

More can be learned about the t-distribution at brainly.com/question/16162795

#SPJ1

5 0

1 year ago

A beach ball has a mass of 5 g and a volume of 20 cm3. What is the object's density? A. 4 g/cm3 B. 100 g/cm3 C. 0.25 D. g/cm3 4

Triss [41]

<h2>Hello!</h2>

The answer is:

C. $0.25\frac{g}{cm^{3} }$

The density is the relation between the mass and the volume of an object. We are given four options to chose, and we can find the correct one by doing the following calculations:

$Density=\frac{mass}{volume}=\frac{5g}{20cm^{3}}=0.25\frac{g}{cm^{3}}$

So, the correct options is C. $0.25\frac{g}{cm^{3} }$

Have a nice day!

7 0

3 years ago

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F(x) =5+ 1 , find f(-4)

tester [92]

Answer:

Step-by-step explanation:

F(x) =5x + 1 , find f(-4)

Putting value of x = 4

F(4) = 5(4) + 1

= 20 + 1 = 21

5 0

2 years ago