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3 years ago

The sum of a number and its square is 42. Which equation can be used to find the two numbers for which this is true?

Mathematics

1 answer:

tankabanditka [31]3 years ago

6 0

Answer:

x² + x = 42

Step-by-step explanation:

Let the number be x then the square of this number is x²

Sum and equate to 42, that is

x² + x = 42

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Answer:

The sample size is 1875.

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.

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

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99.74% confidence level

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The sample size is n. So

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