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Artist 52 [7]
4 years ago
10

There is one error in one of five blocks of a program. To find the error, we test three randomly selected blocks. Let X be the n

umber of errors in these three blocks. Compute E(X) and Var(X).
Mathematics
1 answer:
Molodets [167]4 years ago
7 0
<span>The probability, or expectation value for X in a block, equals the number of occurrences of X in all the blocks divided by the total number of blocks

</span>

well E(X)=µ and 

Var(X)=E[(X-µ)^2]

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Hi I was having some problem with this question, its been a while since I had been in geometry. I think you foil, but Im not sur
DochEvi [55]
First, I would distribute the 2 out to the (x+4). 

2x+8. 

Next, use the foil method to multiply together 2x+8 and (x+3). 

2x^2 +14x+24. 

Do the same process for the other side. 

3(x+2)= 3x+6 

(3x+6)(x-1)= 3x^2+3x-6

Set the remaining products of each side of the equation equal to each other. 

2x^2 +14x+24=3x^2+3x-6. 

Now you must cancel out one side to make the equation equal to zero. Do this by doing the inverse operation on one side of the equation (each value with their like term). I am going to subtract the left side values from the right: 

This means: 
3x^2 minus 2x^2 equals 1x^2 (or just x^2).    

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-6 minus 24 equals -30 

The equation should now look like this: 

0=x^2-11x-30

Reverse the order to get zero on the right side: 

x^2-11x-30=0

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7 0
3 years ago
What is the standard form of this function?
Solnce55 [7]

Answer:

D. Rx) = x2 - 4x + 10

Step-by-step explanation:

R(x)=(x-2)^2+6

R(x)=(x-2)^2+6

=(x-2)(x-2)+6

=x^2-2x-2x+4+6

=x^2-4x+10

R(x) = x^2 - 4x + 10

Option D is the answer

8 0
4 years ago
Solve for x.... please help
Citrus2011 [14]

Answer:

<u>x = 5</u>

Step-by-step explanation:

Both angles add to 180, so by knowing that we can say...

16x - 5 + -5 + 22x = 180

Now simplify and solve

38x - 10 = 180

      38x = 190

          <u>x = 5</u>

8 0
3 years ago
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qaws [65]

Answer: 4/5x

Step-by-step explanation:

4 0
3 years ago
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Hunter-Best [27]
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3 years ago
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