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4 years ago

Please need help on this

Mathematics

2 answers:

serious [3.7K]4 years ago

6 0

4(x-2)=-72

Multiply the bracket by 4

(4)(x)(4)(-2)=-72

4x-8=-72

Move -8 to the other side. Sign changes from -8 to +8.

4x-8+8=-72+8

4x=-64

Divide by 4 for both sides.

4x/4=-64/4

x=-16

Answer : x=-16

solniwko [45]4 years ago

3 0

Answer:

-16

Step-by-step explanation:

Divided both sides by 4 and you get x - 2 = -18. Then you move the constant to the right, x = -18 + 2. Then you calculate and get x = -16

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Answer:

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We are given the following in the question:

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Chi square critical value for upper tail =

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80% confidence interval:

$\dfrac{(n-1)S^2}{\chi^2_{\frac{\alpha}{2}}} < \sigma^2 < \dfrac{(n-1)S^2}{\chi^2_{1-\frac{\alpha}{2}}}$

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Answer:

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