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Paladinen [302]
2 years ago
9

Look inside the screenshot !

Mathematics
2 answers:
vagabundo [1.1K]2 years ago
8 0
28x+8y+2 would be your answer
Alchen [17]2 years ago
4 0

Answer:

28x+8y+2

Step-by-step explanation:

-6x    -24y      10        34x        32y       -8

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both the first one

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-1/2x-1/4(10x-9)=-(-7/4x+2)-x
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Answer:

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Step-by-step explanation:

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3 years ago
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It is thought that not as many Americans buy presents to celebrate Valentine's Day anymore. A random sample of 40 Americans yiel
evablogger [386]

Answer:

98% confidence interval of the true proportion of all Americans who celebrate Valentine's Day

 (0.3672 , 0.7328)

Step-by-step explanation:

<u><em>Explanation:</em></u>-

Given Random sample size n =40

Sample proportion

                            p = \frac{x}{n} = \frac{22}{40} = 0.55

98% confidence interval of the true proportion of all Americans who celebrate Valentine's Day

   

          (p-Z_{\alpha } \sqrt{\frac{pq}{n} } , p + Z_{\alpha } \sqrt{\frac{pq}{n} } )

         

The Z-value Z₀.₉₈ = Z₀.₀₂ = 2.326

98% confidence interval of the true proportion of all Americans who celebrate Valentine's Day

    (0.55-2.326\sqrt{\frac{0.55 X0.45}{40} } , 0.55 + 2.326\sqrt{\frac{0.55 X0.45}{40} } )

  ( 0.55 - 0.1828 , 0.55 + 0.1828)

  (0.3672 , 0.7328)

         

6 0
3 years ago
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