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3 years ago

The product o 4z and 0 is

Mathematics

1 answer:

Kamila [148]3 years ago

8 0

The Government 45 is the first to graduate from school

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Please help 15 points thank you

Furkat [3]

Answer:

Step-by-step explanation:

The common difference is what we add each time,

a2 -a1

15-6 =9

Lets check with

a3-a2

24-15 = 9

We add 9 each time, so 9 is the common difference

(Hint: it is the number multiplied by the variable)

3 0

3 years ago

Suppose the standard deviation of X is 6 and the standard deviation of Y is 8. Answer the following two questions, rounding to t

Darina [25.2K]

Recall that

Var[aX + bY] = a ² Var[X] + 2ab Cov[X, Y] + b ² Var[Y]

Then

Var[3X - 7Y] = 9 Var[X] - 42 Cov[X, Y] + 49 Var[Y]

Now, standard deviation = square root of variance, so

Var[3X - 7Y] = 9×6² - 42×2 + 49×8² = 3376

The general result is easy to prove: by definition,

Var[X] = E[(X - E[X])²] = E[X ²] - E[X]²

Cov[X, Y] = E[(X - E[X]) (Y - E[Y])] = E[XY] - E[X] E[Y]

Then

Var[aX + bY] = E[((aX + bY) - E[aX + bY])²]

… = E[(aX + bY)²] - E[aX + bY]²

… = E[a ² X ² + 2abXY + b ² Y ²] - (a E[X] + b E[Y])²

… = E[a ² X ² + 2abXY + b ² Y ²] - (a ² E[X]² + 2 ab E[X] E[Y] + b ² E[Y]²)

… = a ² E[X ²] + 2ab E[XY] + b ² E[Y ²] - a ² E[X]² - 2 ab E[X] E[Y] - b ² E[Y]²

… = a ² (E[X ²] - E[X]²) + 2ab (E[XY] - E[X] E[Y]) + b ² (E[Y ²] - E[Y]²)

… = a ² Var[X] + 2ab Cov[X, Y] + b ² Var[Y]

6 0

3 years ago

3.Compare properties of squares and rhombi to properties of other quadrilaterals by answering each question. Write a brief expla

frozen [14]

Given:

Quadrilaterals are given.

Opposite sides are equal.

Length of the diagonals are equal.

Angles on four edges is 90 degree.

All sides are equal.

Length of the diagonals are not equal.

Opposite sides are equal.

All sides are equal.

90 degree form in the intersection of the diagonal.

3 0

1 year ago

Find

Aneli [31]

Answer:

8/5

Step-by-step explanation:

4 0

3 years ago

I will give brainliest. I need help ASAP.

Tamiku [17]

Answer:

\I got not answer cause im da BUDDHA

But gimme brainliest squekky plssss

4 0

3 years ago