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3 years ago

Step by step solution to the polynomial equation (×² - x + 5)(x - 3)

Mathematics

1 answer:

denis23 [38]3 years ago

7 0

Answer:

There is no equals sign in that expression so it is not actually an equation and has no solution.

If you are looking to expand the two polynomials, then you get:

(x² - x + 5)(x - 3)

= x(x² - x + 5) - 3(x² - x + 5)

= x³ - x² + 5x - 3x² + 3x - 15

= x³ - 4x² + 8x - 15

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Franchise Business Review stated over 50% of all food franchises earn a profit of less than $50,000 a year. In a sample of 130 c

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Answer:

We need a sample size of 564.

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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$\pi = \frac{81}{130} = 0.6231$

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

95% confidence level

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

Based upon a 95% confidence interval with a desired margin of error of .04, determine a sample size for restaurants that earn less than $50,000 last year.

We need a sample size of n

n is found when $M = 0.04$