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Nady [450]
3 years ago
5

Identify step by step x/5-8=1

Mathematics
1 answer:
Snezhnost [94]3 years ago
6 0

Answer:

x=45 is the ans

Step-by-step explanation:

x/5-8=1

x/5-8×5=1

x/5-40=1

x-40=5

x=45 hope it may help u

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3.24=3+24/100=300/100+24/100=324/100=162/50=81/25
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Prove using identity and trigonometry to prove
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Step-by-step explanation:

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5 0
3 years ago
Kim wants to determine a 90 percent confidence interval for the true proportion of high school students in the area who attend t
PolarNik [594]

Answer:

We need a sample of at least 752 students.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

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The margin of error of the interval is:

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90% confidence level

So \alpha = 0.1, z is the value of Z that has a pvalue of 1 - \frac{0.1}{2} = 0.95, so Z = 1.645.

How large of a sample must she have to get a margin of error less than 0.03

We need a sample of at least n students.

n is found when M = 0.03.

We have no information about the true proportion, so we use \pi = 0.5.

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

0.03 = 1.645\sqrt{\frac{0.5*0.5}{n}}

0.03\sqrt{n} = 1.645*0.5

\sqrt{n} = \frac{1.645*0.5}{0.03}

(\sqrt{n})^{2} = (\frac{1.645*0.5}{0.03})^{2}

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Rounding up

We need a sample of at least 752 students.

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4 years ago
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3 years ago
Of the employees who work at stalling printing 90% attened the safety procedures meeting. If 63 employees attended the meeting h
My name is Ann [436]
90% of what is 63....

0.90x = 63
x = 63 / 0.90
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6 0
3 years ago
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