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deff fn [24]
3 years ago
13

X and Y are independent random variables. X is normally distributed with mean 1 and variance 1. Y is normally distributed with m

ean 3 and variance 5. What is the variance of Y - 2X?
Mathematics
1 answer:
g100num [7]3 years ago
8 0

Answer:

1

Step-by-step explanation:

Equation of variance:

Total Variance = sum (i=1, N) {c^2,variance^2}

= c1^2*variance1^2 + c2^2*variance2^2 + .....

Variance of X = 1

Variance of Y = 5

Variance of Y - 2X = (1^2)*(5) - (2^2)**(1)

= 5 - 4 = 1

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25 Pts + Brainliest for the first correct answer.
WITCHER [35]

Answer:

25.  x=19

26.  16=x

27  28=x

28.  24=x

Step-by-step explanation:

25.  The two angles make a straight line  (180 degrees)

6x-17 + 3x+26 = 180

Combine like terms

9x +9 = 180

Subtract 9 from each side

9x+9-9=180-9

9x = 171

Divide by 9

9x/9 = 171/9

x=19


26.  These angles are corresponding angles and corresponding angles are equal if the lines are parallel

4x+20 = 6x-12

Subtract 4x from each side

4x-4x+20 = 6x-4x-12

20 =2x-12

Add 12 to each side

20+12 = 2x-12+12

32=2x

Divide by 2

32/2 = 2x/2

16=x


27  These are alternate interior angles and alternate interior angles are equal if the lines are parallel.

4x+30 = 6x-26

Subtract 4x from each side

4x-4x+30 = 6x-4x-26

30 = 2x-26

Add 26 to each side

30+26 =2x-26+26

56= 2x

Divide by 2

56/2 = 2x/2

28=x


28.  These are corresponding angles and corresponding angles are equal if the lines are parallel.

99=3x+27

Subtract 27 from each side

99-27 = 3x+27-27

72 = 3x

Divide by 3

72/3 = 3x/3

24=x

6 0
3 years ago
How do you graph this on graph paper using these coordinates? The graph is in shape of a cross. (9,4) (6,-12) (9,-12) (10,-8) (1
TiliK225 [7]
Remember:
(x, y)
      (y-axis)
         |
         |
--------|-------- (x-axis)
          |
          |

You just have to...
fiddle...
around with the graph.
And try to figure out things.

I spent 20 minutes on this.
and couldn't get quite close to a cross.
sorry.

4 0
3 years ago
Hi, can someone please help me? trying to graduate :(
inysia [295]
Slope intercept form is y=mx+b, therefore your answer is D.

Hope this helped :)
8 0
1 year ago
PLEASE HELP ME!!! The formula F =95C + 32 expresses Fahrenheit temperature in terms of Celsius temperature. Find the Celsius tem
Jet001 [13]

Answer:

4C

Step-by-step explanation:

41= x+32

x= 41-32

x = 4C

6 0
2 years ago
In which of the following intervals is the graph decreasing?
Zepler [3.9K]

Answer:

I just need points to ask my own question sorry

6 0
3 years ago
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