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3 years ago

(4x^5 + 3x^2 – x^4) +(6x^2 - 2x^5)

Mathematics

2 answers:

Monica [59]3 years ago

5 0

Answer:

The simplified equation is as follows 2x^5 -x^4 + 9x^2

Step-by-step explanation:

Remove the parentheses around each equation and pair like exponents together

4x^5 - 2x^5 - x^4 + 3x^2 + 6x^2

Then combine the like terms

2x^5 - x^4 + 9x^2

It is in that order due to the proper form being to go from the highest to lowest exponents in an answer

lidiya [134]3 years ago

5 0

2x^5 - x^4 + 9x^2

Step-by-step explanation:

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egoroff_w [7]

Answer:

x=-2 and -32/3

Step-by-step explanation:

|3x+19|=13

3x+19=13 and 3x+19=-13

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2 years ago

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Find the minimum sample size necessary to be 99% confident that the population mean is within 3 units of the sample mean given t

SVEN [57.7K]

Answer:

The minimum sample size required is 207.

Step-by-step explanation:

The (1 - α) % confidence interval for population mean μ is:

$CI=\bar x\pm z_{\alpha /2}\frac{\sigma}{\sqrt{n}}$

The margin of error of this confidence interval is:

$MOE=z_{\alpha /2}\frac{\sigma}{\sqrt{n}}$

Given:

$MOE=3\\\sigma=29\\z_{\alpha /2}=z_{0.01/2}=z_{0.05}=2.576$

*Use a z-table for the critical value.

Compute the value of n as follows:

$MOE=z_{\alpha /2}\frac{\sigma}{\sqrt{n}}\\3=2.576\times \frac{29}{\sqrt{n}} \\n=[\frac{2.576\times29}{3} ]^{2}\\=206.69\\\approx207$

Thus, the minimum sample size required is 207.

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3 years ago

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IrinaVladis [17]

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Step-by-step explanation:

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2 years ago

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xz_007 [3.2K]

Answer:

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Step-by-step explanation:

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Step-by-step explanation:

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