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fenix001 [56]
3 years ago
10

-

\sqrt{5 } - 3 \sqrt{5} " alt=" - \sqrt{5 } - 3 \sqrt{5} " align="absmiddle" class="latex-formula">
​
Mathematics
1 answer:
xxTIMURxx [149]3 years ago
3 0

Step-by-step explanation:

-\sqrt5-3\sqrt5=-1\sqrt5-3\sqrt5=(-1-3)\sqrt5=-4\sqrt5

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kodGreya [7K]
1/5(2x - 10) + 4x = -3(1/5x + 4)
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What is 30/45 simplest form
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3 years ago
Solve for
lakkis [162]

Answer:

x

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Step-by-step explanation:

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2 years ago
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I don’t know how to do it, please teach me !!!
cricket20 [7]

As described in z-distribution the answers are given below:

a) The 95% confidence interval estimate for the population mean spending by a customer on visiting salon per month is given as follows: (747, 853).

b) The sampling error at 95% confidence level is of: $35.78.

What is a z-distribution ?

The normal distribution with a mean of 0 and a standard deviation of 1 is referred to as the standard normal distribution (also known as the Z distribution) (the green curves in the plots to the right). It is frequently referred to as the bell curve since the probability density graph resembles a bell.

solution:

The bounds of the confidence interval are given as follows:

In which:

is the sample mean.

z is the critical value.

n is the sample size. is the standard deviation for the population.

The parameters for this problem are given as follows:

Hence the lower bound of the interval is of:

800 - 200 x 1.96/square root of 55  = 747.

The upper bound of the interval is of:

800 + 200 x 1.96/square root of 55  = 853.

The sampling error for a sample size of 120 is calculated as follows:

200 x 1.96/square root of 120 = $35.78.

To learn more about the z-distribution from the given link

brainly.com/question/4079902

#SPJ1

5 0
1 year ago
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