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3 years ago

I need help, I really don’t understand this topic

Mathematics

1 answer:

alexgriva [62]3 years ago

3 0

Answer:

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Step-by-step explanation:

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Jamie is playing baseball. He gets a hit 7 out of 9 times at bat. What is the experimental probability that Jamie will get a hit

Varvara68 [4.7K]

Answer:

The experimental probability is 7/9

Step-by-step explanation:

In this question, we are told to give the probability that Jamie will get a hit his next time at bat.

Now, looking at the information in the question, we are told that he hits 7 out of 9.

The experimental probability that he would hit his next time at bat is simply 7/9

7 0

4 years ago

One year, many college-bound high school seniors in the U.S. took the Scholastic Aptitude Test (SAT). For the verbal portion of

Butoxors [25]

Using the normal distribution, it is found that 62.46% of students would be expected to score between 350 and 550.

<h3>Normal Probability Distribution</h3>

In a normal distribution with mean $\mu$ and standard deviation $\sigma$ , the z-score of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

It measures how many standard deviations the measure is from the mean.

After finding the z-score, we look at the z-score table and find the p-value associated with this z-score, which is the percentile of X.

In this problem, the mean and the standard deviation are respectively, given by: $\mu = 425, \sigma = 110$

The proportion of students that would be expected to score between 350 and 550 is the <u>p-value of Z when X = 550 subtracted by the p-value of Z when X = 350</u>, hence:

X = 550:

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{550 - 425}{110}$

$Z = 1.14$

$Z = 1.14$ has a p-value of 0.8729.

X = 350:

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{350 - 425}{110}$

$Z = -0.68$

$Z = -0.68$ has a p-value of 0.2483.

0.8729 - 0.2483 = 0.6246

62.46% of students would be expected to score between 350 and 550.

More can be learned about the normal distribution at brainly.com/question/24663213

7 0

2 years ago

Expand the polynomial 6x(x–3)–x(2–x)

tester [92]

Please see the attached picture for full solution

Hope it helps

Good luck on your assignment

Stay safe

4 0

3 years ago

Read 2 more answers

Which expression is equivalent to 9(-4b - 3)?<br> -4b - 27<br> -36b - 27<br> -27b - 36<br> -36b - 3

jenyasd209 [6]

The simple answer to your question is -36b-27

3 0

3 years ago

Read 2 more answers

Write the expression as the sine, cosine, or tangent of an angle. Sin 9x cos x-cos 9x sinx

Kamila [148]

Hint: $\bf sin({{ \alpha}} + {{ \beta}})=sin({{ \alpha}})cos({{ \beta}}) + cos({{ \alpha}})sin({{ \beta}})
\\ \quad \\

sin({{ \alpha}} - {{ \beta}})=sin({{ \alpha}})cos({{ \beta}})- cos({{ \alpha}})sin({{ \beta}})\\\\
-----------------------------\\\\
thus\qquad sin(9x)cos(x)-cos(9x)sin(x)=\boxed{?}$

4 0

3 years ago