3 years ago

Simplify the following expression 3x^4+2x^3-5x^2+4x^2+6x-2x-3x^4+7x^5-3x^3

Mathematics

1 answer:

Alinara [238K]3 years ago

5 0

The answer you would get would be x (-x^2-x+4+7x^4)

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-x+y= -2

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Answer:

parallel

Step-by-step explanation:

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3 years ago

The director of the library believes that 14% of the library's collection is checked out. If the director is right, what is the

Ksivusya [100]

Answer: 0.2643

Step-by-step explanation:

Let p be the population proportion and $\hat{p}$ be the sample proportion .

As per given question , we have

$p=0.14\\\\ \hat{p}=0.13\\\\ n=478$

z-score : $\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}$

$z=\dfrac{0.13-0.14}{\sqrt{\dfrac{0.14(1-0.14)}{478}}}\\\\=-0.630087269176\approx-0.63$

The required probability ( using z-table ):-

$P(z$

Hence, the probability that the proportion of books checked out in a sample of 478 books would be less than 13% = 0.2643

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Answer:

10. MN=17.9 in

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Answer: m = - $\frac{1}{40} \\$

Step-by-step explanation:

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