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3 years ago

Solve for y -5 = (y-7)(1/9)

Mathematics

1 answer:

Anna11 [10]3 years ago

3 0

Answer:

y=58/9

y=6 2/9

Step-by-step explanation:

-5 = (y-7)(1/9)

*1/9-5 = (y-7)(1/9)*1/9

7+-5/9=y-7+7

58/9=y

y=6 2/9

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Hitman42 [59]

Answer:

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Step-by-step explanation:

We are given the following in the question:

Population variance = 484

Standard deviation =

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Significance level = 0.05

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Formula:

Margin of error =

$E = z\times \dfrac{\sigma}{\sqrt{n}}\\\\n = (\dfrac{z\times \sigma}{E})^2$

$z_{critical}\text{ at}~\alpha_{0.05} = 1.96$

Putting values, we get

$E\leq 5\\\\1.96\times \dfrac{22}{\sqrt{n}} \leq 5\\\\\sqrt{n} \geq 1.96\times \dfrac{22}{5}\\\\n \geq (1.96\times \dfrac{22}{5})^2\\\\n \geq 74.373$

Thus, the minimum sample size is n = 75 so that the desired margin of error is 5 or less.

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3 years ago

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kotykmax [81]

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Step-by-step explanation:

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Keeping the above on mind, you obtain that the product is:

$\frac{2*9}{(2x+3)x}$

$\frac{18}{2x^{2}+3x}$

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