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2 years ago

Pls help is it a b or c will give brainliest btw

Mathematics

2 answers:

monitta2 years ago

8 0

Answer:

Step-by-step explanation:

because there was no mistake

Lelu [443]2 years ago

3 0

Answer:

The answer is C. Annie didn't make a mistake.

Step-by-step explanation:

To get k, we subtract 7.5 from both sides of the equation.

10 - 7.5 equals 2.5.

So, Annie is correct.

#teamtrees #WAP (Water And Plant)

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-7(2)+y=60
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6.Suppose the Gallup Organization wants to estimate the population proportion of those who think there should be a law that woul

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A sample of $n = (\frac{1.96\sqrt{0.3696*0.6304}}{E})^2$ is needed, in which E is the desired margin of error, as a proportion. If we find a decimal value, we round up to the next whole number.

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.

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So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - \frac{0.05}{2} = 0.975$ , so $Z = 1.96$ .

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

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$E\sqrt{n} = 1.96\sqrt{0.3696*0.6304}$

$\sqrt{n} = \frac{1.96\sqrt{0.3696*0.6304}}{E}$

$(\sqrt{n})^2 = (\frac{1.96\sqrt{0.3696*0.6304}}{E})^2$

$n = (\frac{1.96\sqrt{0.3696*0.6304}}{E})^2$

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2 years ago

What is the simplified form of the following expression?

Igoryamba

Answer:

169 is the answer.

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I used a calculator.

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