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1 year ago

The X and Ys are confusing

Mathematics

2 answers:

yuradex [85]1 year ago

8 0

Answer:

-15x²y

Step-by-step explanation:

Given that,

→ -12x²y - 3x²y

Then the solution will be,

→ -12x²y - 3x²y

→ -15x²y

So, the answer is -15x²y.

professor190 [17]1 year ago

7 0

Answer: -15yx^2

Step-by-step explanation:

-12x^2 * y -3x^2 * y=

-12(x^2 * y)-3(x^2 * y)=

(-12-3)(x^2 * y)=

-15x^2 * y=-15yx^2

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VladimirAG [237]

Answer:

$\sigma = 5.5$

And we have a sample size of n =81. We want to estimate the standard error of the sampling distribution $\bar X$ and for this case we know that the distribution is given by:

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

And the standard error would be:

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

And replacing we got:

$\sigma_{\bar x}=\frac{5.5}{\sqrt{81}}= 0.611$

Step-by-step explanation:

For this case we know the population deviation given by:

$\sigma = 5.5$

And we have a sample size of n =81. We want to estimate the standard error of the sampling distribution $\bar X$ and for this case we know that the distribution is given by:

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

And the standard error would be:

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

And replacing we got:

$\sigma_{\bar x}=\frac{5.5}{\sqrt{81}}= 0.611$

4 0

2 years ago

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sertanlavr [38]

Answer:

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Step-by-step explanation: