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2 years ago

PLEASEE Solve x=6 4x +y =20

Mathematics

2 answers:

Tanya [424]2 years ago

8 0

Answer: y = -4

Step-by-step explanation:

4 (6) + y = 20

24 + y = 20

-24 -24

y = -4

Stels [109]2 years ago

3 0

Answer:

x = 6

y = -4

Step-by-step explanation:

Comment

You have 2 equations

x = 6

4x + y = 20

You already know what x is from the first equation.

All you need do is put 6 in for x in the second equation.

Solution

x = 6

4*6 + y = 20 Combine what you can on the left

24 + y = 20 Subtract 24 from both sides

24-24+ y = 20-24 Combine

y = - 4

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Tresset [83]

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3 years ago

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What is the solution to the following equation 4x+3y-z=-6

Alexandra [31]

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4 years ago

What are the domain and range of the function f(x)=3/6x+5

devlian [24]

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3 years ago

The number of hurricanes that will hit a certain house in the next ten years is Poisson distributed with mean 4. Each hurricane

bulgar [2K]

Answer:

The variance of total loss is 8000000

Step-by-step explanation:

Let

$X \to$ Number of hurricane

Poisson $E(X) = 4$

$Y \to$ Loss in each hurricane

Exponential $E(Y) = 1000$

$T \to$ Total Loss

Required

The variance of the total loss

This is calculated as:

$Var(T) = Var(E(T|X)) + E(Var(T|X))$

Where:

$E(T|X) \to$ Expected total loss given X hurricanes

And it is calculated as:

$E(T|X) = E(Y) *N$ --- Expected Loss in each hurricane * number of loss

$Var(T|X) \to$ Variance of total loss given X hurricanes

And it is calculated as:

$Var(T|X) = Var(Y) * N$ ---- --- Variance of loss in each hurricane * number of loss

So, we have:

$Var(T) = Var(E(T|X)) + E(Var(T|X))$

$Var(T) = Var(E(Y) * N) + E(Var(Y) * N)$

For exponential distribution;

$Var(Y) = E(Y)^2$

So, we have:

$Var(T) = Var(E(Y) * X) + E(E(Y)^2 * X)$

Substitute values

$Var(T) = Var(1000 * X) + E(1000^2 * X)$

Simplify:

$Var(T) = Var(1000 * X) + 1000^2E(X)$

Using variance formula, we have:

$Var(T) = 1000^2Var(X) + 1000^2E(X)$

For poission distribution:

$Var(X) = E(X)$

So, we have:

$Var(X) = E(X) = 4$

The expression becomes:

$Var(T) = 1000^2*4 + 1000^2*4$

$Var(T) = 1000000*4 + 1000000*4$

$Var(T) = 4000000 + 4000000$

$Var(T) = 8000000$

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3 years ago

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trapecia [35]

Plug Y = 0 in given equation to find X,

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Hope this helps!

4 0

4 years ago

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