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4 years ago

What is the equivalent expression of 5(3-4y)?

Mathematics

1 answer:

Pie4 years ago

3 0

15-20y

you simply distribute the factors.

5 x 3 = 15

5 x -4y = -20y

Final answer: 15 - 20y

OR

15 + (-20y)

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For the expression, which of the following is the coefficient of the term involving the variable x^3/2 + 4y + 5z²

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Answer:

Step-by-step explanation:

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3 years ago

Suppose a simple random sample of size n is drawn from a large population with mean mu and standard deviation sigma. The samplin

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Answer:

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Since the distribution for X is normal then we can conclude that the distribution for the sample mean $\bar X$ is given by:

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Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

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Solution to the problem

Let X the random variable that represent the variable of interest of a population, and for this case we know the distribution for X is given by:

$X \sim N(\mu,\sigma)$

Where $\mu$ the mean and $\sigma$ the deviation

Since the distribution for X is normal then we can conclude that the distribution for the sample mean $\bar X$ is given by:

$\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})$

$\mu_{\bar X} = \mu$

$\sigma_{\bar X}= \frac{\sigma}{\sqrt{n}}$

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3 years ago

Read 2 more answers

I need help so i know what to do for test ?

Paraphin [41]

Answer:

y = -4

Step-by-step explanation:

See attached worksheet.

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Answer:

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