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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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Ann [662]

Answer:

Option B is correct that is  amount she is getting per bottle is $0.15  

Step-by-step explanation:

We have been given the information that melisande collected 14 bottles on saturday and 9 bottles on sunday

That means she has collected total of 23 bottles

Let us assume that the amount she is paid for recycling is $b

Since, she is left with $3.20 after the amount she gets for bottles we will get the equation below:

23b=3.20

Now, since she has to pay one time service fee equation will become

23b -0.25 =3.20

After simplification we will  get

23b=3.20+0.25=3.45

b=3.45/23=.15

b=$0.15

Therefore, The amount she is getting per bottle is $0.15

4 0
3 years ago
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If x=2 ,y=12 and x=4,y=3,find n and k if y is inversely proportional to x and k is a constant
Setler [38]

question:

x=2 ,<em>y</em>=12 and x=4,y=3,find n and k if y is inversely proportional to x and k is a constant

answer:

k=12 x=3 n=4

explain:

that the answer because the question said find the k and x and n so I find them

8 0
2 years ago
Draw and identify the coordinates of the image of the figure after a 90° counterclockwise rotation about the origin. ​
Galina-37 [17]

Answer:

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Step-by-step explanation:

6 0
3 years ago
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Alenkinab [10]

9514 1404 393

Answer:

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Step-by-step explanation:

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Multiplying by 12 gives ...

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It is probably sufficient to report the number to 2 significant figures*:

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* Unfortunately, with a number like 1000, the only way you can tell it has 2 significant figures is to report it as 1.0×10³ or 10. hundreds. The trailing zeros are usually not considered significant.

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3 years ago
What is the product of (7.28 x 10-2). (9.1 x 10-2)?
tangare [24]

Answer:

B

Step-by-step explanation:

7 0
3 years ago
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