What is 4y=1/2 equal

Mathematics

2 answers:

mr Goodwill [35]3 years ago

7 0

The correct answer is y=1/8. Hope this helps.

True [87]3 years ago

3 0

Simplify the left side.−y−24y=y−910yRemove parentheses.−y−24y=y−910ySet up the rational expression with the same denominator over the entire equation.−5y−1020y=2y−1820ySince the expression on each side of the equation has the same denominator, the numerators must be equal.−(5y−10)=2y−18Simplify the left side−5y+10=2y−18Move all terms containing y to the left side of the equation−7y+10=−18Move all terms not containing y to the right side of the equation.−7y=−28Divide each term by −7 and simplify.y=4Check that all solutions found are valid and are part of the domain by substituting them into the original equation.y=4

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lana66690 [7]

Answer:

a) $n=\frac{0.76(1-0.76)}{(\frac{0.01}{1.64})^2}=4905.83$

And rounded up we have that n=4906

b) For this case since we don't have prior info we need to use as estimatro for the proportion $\hat p =0.5$

$n=\frac{0.5(1-0.5)}{(\frac{0.01}{1.64})^2}=6724$

And rounded up we have that n=6724

Step-by-step explanation:

We need to remember that the confidence interval for the true proportion is given by :

$\hat p \pm z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}$

Part a

The estimated proportion for this case is $\hat p =0.76$

Our interval is at 90% of confidence, and the significance level is given by $\alpha=1-0.90=0.1$ and $\alpha/2 =0.05$ . The critical values for this case are: