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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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Bytecoin is a new cryptocurrency that is currently valued at $243 per coin. You want to make an investment and purchase 1 Byteco
Digiron [165]

Answer:

Step-by-step explanation:

The growth rate of the coin is exponential. We would apply the formula for exponential growth which is expressed as

y = ab^x

y = b(1 + r)^ t

Where

y represents the value of the coin after x months.

x represents the number of months.

a represents the initial value of the coin.

b represents rate of growth.

From the information given,

a = 243

b = 1 + 15/100 = 1 + 0.15 = 1.15

Therefore, the exponential expression to determine the number of months, x it will take for the coin to attain a certain value, y is expressed as

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If y = 1000, it means that

1000 = 243(1.15)^x

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Taking log of both sides, it becomes

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x = 10 months

It will take 10 months

7 0
3 years ago
Y = ¼ x and y=¼x - 5. explain how the graphs are the same and how they are different
emmasim [6.3K]
Do you still need help with this if so graphes have a bigger letter and a smaller letter 
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The length of a rectangle is 55 inches more than the width. the perimeter is 4242 inches. find the length and the width of the r
faust18 [17]
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Answer:

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Or

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12c + 9c + 6c

c(12 + 9 + 6)

6 0
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