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3 years ago

15 points. Please explain your answer thanks so much.:)

Mathematics

1 answer:

Anni [7]3 years ago

7 0

Answer:

CDJ= 34

Step-by-step explanation:

We know that ADJ = 90 degrees

ADK = 180 degrees and JDK equals 90 degrees so ADJ must equal 90 degrees

ADJ = ADC+CDJ

ADJ =4x+ 3x-8

Since ADJ = 90 degrees

90 = 4x+3x-8

Combine like terms

90 = 7x-8

Add 8 to each side

90+8 = 7x-8+8

98 = 7x

Divide each side by 7

98/7 = 7x/7

14 =x

We want to know CDJ

CDJ = 3x-8

CDJ = 3(14) -8

CDJ = 42-8

CDJ= 34

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Answer:

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Step-by-step explanation:

From the question we are told that:

Sample size n=38

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Generally the equation for A to be twice as popular as B is mathematically given by

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Therefore Hypothesis

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$z=\frac{x-np_0-0.5}{\sqrt{np_0(1-p_0)} }$

$z=\frac{28-(38*2/3)_0-0.5}{\sqrt{38*2/3*1/3} }$

$z=0.75$

Therefore from distribution table

$Pvalue=1-\theta (0.75)$

$Pvalue=0.227$

Therefore there is no sufficient evidence to disagree with the Null hypothesis $H_0$

Therefore the statement that cushion A is twice as popular as cushion B cannot be verified

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3 years ago

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Dmitrij [34]

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