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Anna11 [10]
3 years ago
9

Is this correct? If not can I plz have the correct answer

Mathematics
2 answers:
andrezito [222]3 years ago
7 0

Answer:

3(x-7)=2/3(x+2)+2 |*3

9(x-7)=2(x+2)+2

9x-63=2x+4+2 |+63

9x=2x+69 |-2x

7x=69 |÷7

X=9.85

Tip: If you devide, Substract or Do anything else you have to Do it to both sides of the "="

Tomtit [17]3 years ago
6 0
Yes it is correct its right you have solved it correct
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Find the sample size required to achieve the given margin of error with SD = 51.02 and z - score = 1.96. Round your answer to th
coldgirl [10]

Answer:

The sample size required is 2500.

Step-by-step explanation:

z-score:

In function of the margin of error M, the z-score is given by:

Z = \frac{M}{\frac{\sigma}{\sqrt{n}}} = \frac{M\sqrt{n}}{\sigma}

In this question, we have that:

\sigma = 51.02, M = 2, Z = 1.96

So

Z = \frac{M\sqrt{n}}{\sigma}

1.96 = \frac{2\sqrt{n}}{51.02}

2\sqrt{n} = 51.02*1.96

\sqrt{n} = \frac{51.02*1.96}{2}

(\sqrt{n})^2 = (\frac{51.02*1.96}{2})^2

n = 2500

The sample size required is 2500.

3 0
3 years ago
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mixas84 [53]
The correct answer is D.
7 0
3 years ago
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What is the value of the x in the equation? x+1/8=3/4​
creativ13 [48]

Answer:

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Step-by-step explanation:

Isolate the variable by subtracting 1/8 from both sides:

3/4 - 1/8 = 5/8

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djverab [1.8K]

Answer:

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Step-by-step explanation:

Hello

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3 years ago
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