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3 years ago

Can someone help me please

Mathematics

1 answer:

krok68 [10]3 years ago

5 0

Answer:

iTS 2

Step-by-step explanation:

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10 = 3x – 8 what is this

Margaret [11]

Answer:

Answer is below

Step-by-step explanation:

10=3x-8

always remember to flip the equation

3x-8=10

Add 8 to both sides

3x-8(+8)=10(+8)

3x=18

Divide both sides by 3

3x/3=18/3

x=6

8 0

3 years ago

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The amount of lateral expansion (mils) was determined for a sample of n = 8 pulsed-power gas metal arc welds used in LNG ship co

Alona [7]

Answer:

95% Confidence interval for the variance:

$3.6511\leq \sigma^2\leq 34.5972$

95% Confidence interval for the standard deviation:

$1.9108\leq \sigma \leq 5.8819$

Step-by-step explanation:

We have to calculate a 95% confidence interval for the standard deviation σ and the variance σ².

The sample, of size n=8, has a standard deviation of s=2.89 miles.

Then, the variance of the sample is

$s^2=2.89^2=8.3521$

The confidence interval for the variance is:

$\dfrac{ (n - 1) s^2}{ \chi_{\alpha/2}^2} \leq \sigma^2 \leq \dfrac{ (n - 1) s^2}{\chi_{1-\alpha/2}^2}$

The critical values for the Chi-square distribution for a 95% confidence (α=0.05) interval are:

$\chi_{0.025}=1.6899\\\\\chi_{0.975}=16.0128$

Then, the confidence interval can be calculated as:

$\dfrac{ (8 - 1) 8.3521}{ 16.0128} \leq \sigma^2 \leq \dfrac{ (8 - 1) 8.3521}{1.6899}\\\\\\3.6511\leq \sigma^2\leq 34.5972$

If we calculate the square root for each bound we will have the confidence interval for the standard deviation:

$\sqrt{3.6511}\leq \sigma\leq \sqrt{34.5972}\\\\\\1.9108\leq \sigma \leq 5.8819$

6 0

3 years ago

Pl help it’s for a grade I will give you Brainly if right

rodikova [14]

Answer:

Step-by-step explanation:

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2 years ago

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What was McClellan’s mistake at the beginning of the Civil War?

Zolol [24]

Answer:

Step-by-step explanation:

Frustrated that McClellan had again failed to destroy Lee's army

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2 years ago

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Are thes coordinates a function or not? (2,2) (2,7) (-2,9) (-4,-5)

blagie [28]

This is not a function. There are multiple outputs for the same input at $x=2$ . A function only has 1 output for every input.

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3 years ago

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