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2 years ago

What is x in the equation

Mathematics

2 answers:

vlabodo [156]2 years ago

8 0

Answer:

-7(x-6)= -70

X-6=-70/-7

X-6=10

X=16

Valentin [98]2 years ago

4 0

X is 17
don’t hate me if it’s wrong pls :,) good luck my fellow homie

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mario62 [17]

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2 years ago

A simple random sample of 60 items resulted in a sample mean of 65. The population standard deviation is 14. a. Compute the 95%

bazaltina [42]

Answer:

The 95% confidence interval for the population mean is between 61.5 and 68.5.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.95}{2} = 0.025$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.025 = 0.975$ , so $z = 1.96$

Now, find M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

$M = 1.96*\frac{14}{\sqrt{60}} = 3.5$

The lower end of the interval is the sample mean subtracted by M. So it is 65 - 3.5 = 61.5

The upper end of the interval is the sample mean added to M. So it is 65 + 3.5 = 68.5

The 95% confidence interval for the population mean is between 61.5 and 68.5.

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2 years ago

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A manufacturer Phils various size boxes of flour. Today, the box and are 12 inches tall, 8 inches wide and 3 inches deep. They a

Digiron [165]

Here is what I got:(maybe wrong) 12*8*3 = 288, which is how big the box is. Then, you remove 1.5 inches from the height and get 10.5*8*3, which is 252. Subtract 252 from 288 to get the answer, 36.

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svlad2 [7]

Answer:

Step-by-step explanation:

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sqrt(120/30)

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