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faust18 [17]
4 years ago
14

(50 points)(please make sure you know what you're doing)(absurd answers will be reported)

Mathematics
1 answer:
Tatiana [17]4 years ago
7 0

Answer:

  see below

Step-by-step explanation:

Putting each equation in standard form is a good start.

1. Divide the first equation by 2. Divide the second equation by -5.

  • x +2y = 2
  • x - y = -1

2. Divide the first equation by 2; multiply the second by -1.

  • x +2y = 2
  • 3x -y = 1

3. Divide the first equation by 2.

  • x +2y = 2
  • 7x +5y = -1

4. Divide the first equation by 2.

  • x +2y = 2
  • 7x -y = 5

5. Divide the first equation by 2.

  • x +2y = 2
  • 7x -y = -1
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Answer:

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Step-by-step explanation:

For part a,

The mean is 70 and the standard deviation is 5.  This means that 2 standard deviations above the mean is 70+5+5 = 80.

This means that 80 is not an outlier, as it is not more than 2.5 standard deviations above the mean.

For part b,

The mean is 70 and the standard deviation is 3.  This means that 2 standard deviations above the mean is 70+3+3 = 76; 3 standard deviations above the mean is 70+3+3+3 = 79.  80 is more than this, so yes, it is an outlier.

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4 years ago
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grigory [225]
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Answer:

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