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Aloiza [94]
3 years ago
9

Three polynomials are factored below, but some coefficients and constants are missing. All of the missing values of a, b, c, and

d are integers 1. x^2-2x-15=(ax+b)(cx+d) 2. 2x^-6x-36x=2x(ax+b)(cx+d) 3. 4x^2+10x+4=(ax+b)(cx+d) . Fill in the table with the missing values of a, b, c, and d.
Mathematics
1 answer:
Travka [436]3 years ago
5 0

Answer:

  1. (1, -5, 1, 3)
  2. (2, -12, 1, 3)
  3. (4, 2, 1, 2)

Step-by-step explanation:

Obviously, factors can be written in any order. So, there are multiple answers to this question.

1. x^2 -2x -15 = (x -5)(x +3) . . . . (a, b, c, d) = (1, -5, 1, 3)

__

2. 2x^2 -6x -36 = 2(x^2 -3x -18) = 2(x -6)(x +3) . . . . (a, b, c, d) = (2, -12, 1, 3)

__

3. 4x^2 +10x +4 = 2(2x^2 +5x +2) = 2(2x +1)(x +2) . . . . (a, b, c, d) = (4, 2, 1, 2)

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Answer:

The 95% confidence interval for the population mean is between 17.93 days and 24.07 days.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.95}{2} = 0.025

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.025 = 0.975, so z = 1.96

Now, find M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

M = 1.96\frac{7}{\sqrt{20}} = 3.07

The lower end of the interval is the sample mean subtracted by M. So it is 21 - 3.07 = 17.93 days

The upper end of the interval is the sample mean added to M. So it is 21 + 3.07 = 24.07 days

The 95% confidence interval for the population mean is between 17.93 days and 24.07 days.

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Step-by-step explanation:

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Given a data set consisting of 33 unique whole number observations, its five-number summary is: [19,32,47,61,77] how many observations are strictly less than 32?

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Third Quartile = 61

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Answer:

Assessment started: undefined.

Item 1

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Enter your answer as a fraction in simplest form by filling in the boxes.

Step-by-step explanation:

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Fynjy0 [20]

Brian was billed for 171 minutes.

Step-by-step explanation:

Given,

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x be the minutes billed.

Therefore,

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Dividing both sides by 0.06

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Keywords: linear equation, division

Learn more about division at:

  • brainly.com/question/10771256
  • brainly.com/question/10772249

#LearnwithBrainly

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