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lisov135 [29]
3 years ago
5

Variance is_________.

Mathematics
1 answer:
katrin [286]3 years ago
3 0

Answer:

B

Step-by-step explanation:

Variance can be said to be a measure of dispersion for a random sample.

Variance = pq/n

When given the variance, we can find the standard deviation.

Standard deviation = √variance

= √pq/n

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Find the sum of ∑4/k=1 (-4k)
Annette [7]

Answer:

Hello,

Answer C: -40

Step-by-step explanation:

\displaystyle \sum_{k=1}^4\ (-4k)\\\\=-4*\sum_{k=1}^4\ k\\\\=-4*4*\dfrac{1+4}{2} \\\\=-4*5*2\\\\=-40\\

4 0
3 years ago
Find the value of x.<br> to<br> 4<br> 42°<br> 60°<br> -
nata0808 [166]

Answer:

Step-by-step explanation:

The missing angle of the triangle is 180°-42°-60° = 78°.

x° =  180°-78° = 102°

3 0
3 years ago
The price of a dress is reduced by 55​0%. When the dress still does not​ sell, it is reduced by 55​0% of the reduced price. If t
Masja [62]

Answer:

x = $200

The original price is $200

Question :

The price of a dress is reduced by 50%. When the dress still does not​ sell, it is reduced by 50% of the reduced price. If the price of the dress after both reductions is ​$50, what was the original​ price?

Step-by-step explanation:

Let x represent the original price of the dress.

First reduction

After first reduction the value of the price is given as;

p1 = x - 50% of x = (1-0.50)x = 0.5x

p1 = 0.5x

Second reduction

After the second reduction the value of the price is given as;

p2 = p1 - 50% of p1 = (1-0.50)p1 = (0.50)0.50x

p2 = 0.25x .....1

Since, p2 is given

p2 = $50

Substituting into equation 1

$50 = 0.25x

x = $50/0.25 = $200

x = $200

The original price is $200

4 0
3 years ago
Given the function f(x)= x^4 - 4x^3 -2, determine the absolute minimum value of ff on the closed interval [-2, 4].
kobusy [5.1K]

Answer:

Absolute Minimum: (3,−29)

Step-by-step explanation:

4 0
3 years ago
ASAP!! Please help me. I will not accept nonsense answers, but will mark as BRAINLIEST if you answer is correctly with solutions
rewona [7]

x-2 is a factor so x = 2 is a root of f(x)

This is because f(x) = (x-2)*g(x) for some polynomial g(x). We don't have to worry about what g(x) is equal to as it doesn't affect the status of the root we're after.

So,

f(x) = 0

(x-2)*g(x) = 0

x-2 = 0 or g(x) = 0

x = 2 or g(x) = 0

This shows how the factor x-2 leads to the root x = 2

Therefore, f(2) = 0

Answer: Choice D

4 0
3 years ago
Read 2 more answers
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