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FromTheMoon [43]
2 years ago
15

HELP SOLVE THANK YOU!

Mathematics
2 answers:
aleksklad [387]2 years ago
8 0

<u>Let's first move everything, the constants and variables to one side</u>

    x^2-2=2x ⇒ x^2-2x-2=0

<u>The second form is in the general form of the quadratic equation</u>:

 ⇒ ax^2+bx+c = 0

  • a ⇒ 1
  • b ⇒ -2
  • c ⇒ -2

<u>To find the value of x, we can use the quadratic formula:</u>

  ⇒<em> look at the diagram attached</em>

<em />

<em>   </em>x = \frac{-b-\sqrt{b^2-4ac} }{2a} =\frac{2-\sqrt{(-2)^2-4(1)(-2)} }{2*1} =\frac{2-\sqrt{4+8} }{2} =\frac{2-\sqrt{12} }{2} =\frac{2-2\sqrt{3}}{2} =1-\sqrt{3}

  x = \frac{-b+\sqrt{b^2-4ac} }{2a} =\frac{2+\sqrt{(-2)^2-4(1)(-2)} }{2*1} =\frac{2+\sqrt{4+8} }{2} =\frac{2+\sqrt{12} }{2} =\frac{2+2\sqrt{3}}{2} =1+\sqrt{3}  

                      /\

                      | |

                      | |

                  <u>Answer</u>

<u>To answer the question, just answer in the order I solved it, because the question asks you to put the answer in ascending order which means from least to greatest.</u>

<u />

Hope that helps!

Lera25 [3.4K]2 years ago
4 0

Answer:

Solution 1: 1+1\sqrt{3}

Solution 2: 1-1\sqrt{3}

Step-by-step explanation:

x^2-2=2x

x^2-2x-2=0

Use quadratic equation.

(-b+-\sqrt{b^2-4ac})/2a

(2+-\sqrt{(-2)^2-4*1*-2})/2

(2+-\sqrt{(4+8}))/2

(2+-\sqrt{12})/2

Solution 1: (2+2\sqrt{3})/2=1+1\sqrt{3}

Solution 2: 1-1\sqrt{3}

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Anestetic [448]

Answer:

House A

Step-by-step explanation

For house A:

divide 125,260 by to to find 10%.

10% = 12,526.The you divide this by two to get 5%.

5% = 6,263.Next add the original figure with the 5%. To makes things simpler insted of adding 5% percent twice(since were calculating for two years) just add the 10% to the original figure you get:

125,260 + 12,526= $137,786

For house B:

This is a little different than before. Find ten percent then 5 percent.

10%= 12,016

5%=6,008.Next to find 1% divide the 10% again!

1%-1,201.6,After add the five percent and 1% to find 6%.

6%=7,209.6. Multiply the 6% by 2 to find the price for 2 years.Next add the original number to the 12%.

12%=14,419.2

17,419.2+120,160= $134,579.2

In conclusion:

Compare the prices-

A=$137,786

B=$134,579.2

House A earns more money after two years.

Your welcome,this took me forevever:)))))

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Step-by-step explanation:

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Answer:

The p-value of the test is 0.9918 > 0.05, which means that we fail to reject H_0, as we do not have enough evidence to say that defect rate of machine is smaller than 3%.

Step-by-step explanation:

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The test statistic is:

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In which X is the sample mean, \mu is the value tested at the null hypothesis, \sigma is the standard deviation and n is the size of the sample.

0.03 is tested at the null hypothesis:

This means that \mu = 0.03, \sigma = \sqrt{0.03*0.97}

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This means that n = 600, X = \frac{28}{600} = 0.0467

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Step-by-step explanation:

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