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2 years ago

MEAN #NIGHTMAREEEEEEEEEEEEEEEEEEE 50 POINTS FOR REAL

Mathematics

2 answers:

attashe74 [19]2 years ago

5 0

The following steps will show you how to calculate the sample mean of a data set:

Add up the sample items.

Divide sum by the number of samples.

The result is the mean.

Use the mean to find the variance.

Use the variance to find the standard deviation.

Sergeeva-Olga [200]2 years ago

4 0

Answer:

The following steps will show you how to calculate the sample mean of a data set:

Add up the sample items.

Divide sum by the number of samples.

The result is the mean.

Use the mean to find the variance.

Use the variance to find the standard deviation.

Step-by-step explanation:

The guy up there did good. I used 100pts to ask a question not 50

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3 years ago

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3 years ago

The graph of a quadratic function has a vertex at (5,3) and goes through the point (-1,-9). What is the equation of the function

kotegsom [21]

Answer:

$y=-\frac{1}{3} (x-5)^2+3$

Step-by-step explanation:

We are given the following;

Vertex of a quadratic function = (5,3)
A point where the function passes through (-1, -9)

Required to determine the equation of the function;

We need to know the vertex form of a quadratic function is;

$y=a(x-h)^2+k$ , where h and k correspond to the vertex (h,k)

Therefore, we can replace the variables h and k of the vertex in the equation;

That is;

$y=a(x-5)^2+3$

Then we use the equation and the point given to solve for a

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We get;

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Substituting the values of a, h and k in the equation, we get;

$y=-\frac{1}{3} (x-5)^2+3$

Thus, the equation of the function in the vertex form is $y=-\frac{1}{3} (x-5)^2+3$

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2 years ago