Uhhh what is 2+2-2+2

Mathematics

2 answers:

Veseljchak [2.6K]3 years ago

5 0

Answer:

Step-by-step explanation:

2+2= 4

4-2=2

2+2= 4

Ierofanga [76]3 years ago

4 0

Its 4 because 2+2 is 4 and then you're subtracting 2 and then adding 2 again so its 4

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A desk manufacturer claims that the average time it takes to assemble a desk is 90 minutes with a standard deviation of 32 minut

stealth61 [152]

Answer:

The standard deviation of the sample mean is 4 minutes

Step-by-step explanation:

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean $\mu$ and standard deviation $\sigma$ , the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean $\mu$ and standard deviation $s = \frac{\sigma}{\sqrt{n}}$ .

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

In this problem, we have that:

The standard deviation of the population is 32.

Sample of 64.

$s = \frac{32}{\sqrt{64}} = 4$

The standard deviation of the sample mean is 4 minutes

6 0

3 years ago

Find the nonpermissible replacement for a in this expression 6/-5a

Mademuasel [1]

Find the nonpermissible replacement for a in this expression 6/-5a

Denominator cannot be zero or else undefined so set the denominator to zero and solve for the a that will cause the denominator to be zero.
-5a=0
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x=0

Nonpermissable replacement is 0.

4 0

4 years ago

5. Which will result in a positive number?

abruzzese [7]

So the right answer is of option D.

Look at the attached picture

Hope it will help you