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AVprozaik [17]
3 years ago
7

Help asp! i will give branilest i think thats how you spell it

Mathematics
1 answer:
almond37 [142]3 years ago
3 0
The answer is D! 4(2a + 3) = 8a + 12
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The variance can never bea.zerob.larger than the standard deviationc.negatived.smaller than the standard deviation
MrRa [10]

Answer:

c.negative

True, by definition since the variance take in count the differences around the mean squared, then we can't have a negative value for a sum of square values.

Step-by-step explanation:

We need to remember that the variance is a measure of dispersion for a dataset respect to a measure of central tendency called the mean. The mean is defined as:

\bar x = \frac{\sum_{i=1}^n X_i}{n}

And the population mean is given by:

\mu= \frac{\sum_{i=1}^n X_i}{N}

The population variance is defined by:

\sigma^2 = \frac{\sum_{i=1}^n (X_i -\mu)^2}{N}

And the sample variance is defined as:

s^2= \frac{\sum_{i=1}^n (X_i -\bar x)}{n-1}

Now if we analyze the options we have this:

a.zero

False, if all the values are the same then the mean would be the same to the values and the difference between each value and the mean would 0 and indeed the variance would be 0.

b.larger than the standard deviation

False, if the population standard deviation is \sigma=2 then the variance would be \sigma^2 = 4 and as we can see is higher than the standard deviation

c.negative

True, by definition since the variance take in count the differences around the mean squared, then we can't have a negative value for a sum of square values.

d.smaller than the standard deviation

False, if the population standard deviation is \sigma=0.1 then the variance would be \sigma^2 = 0.01 and as we can see is lower than the standard deviation

7 0
3 years ago
How do you find the slop and y intercept of a graph
NemiM [27]
Y=mx+b is the formula you use to find the answer
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Emily's bill for dinner at a restaurant was $61. She left an 18% tip. What was the amount of the tip?
UkoKoshka [18]
You cross multiply. So 61 over 18 = x over 100. You multiply 61 and get the answer of 1600. Now with what you have left, you divide that with 18 and you should get your answer of <span>338.888889. Make sure to round it to whatever it tells you to round to!</span>

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If f(x)=3x^2+1 and g(x)=1-x, what is the value of (f-g)(2)?
madam [21]
The answer is 14 you just have to substitute x with the given number and finish the equation
3 0
3 years ago
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Cassidy is using six different pontominoes to make a rectangle
SpyIntel [72]

Answer:

D

Step-by-step explanation:

D

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