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Artist 52 [7]
3 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]3 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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Compare the functions shown below: f(x) cosine graph with points at 0, negative 1 and pi over 2, 1 and pi, 3 and 3 pi over 2, 1
Levart [38]

Answer:

  f(x) and h(x) have the same maximum value: 3

Step-by-step explanation:

The maximum value of f(x) is 3 at (π, 3).

The maximum value of g(x) is -2 at (-3, -2).

The maximum value of h(x) is 3 at (0, 3).

Both f(x) and h(x) have the same (greatest) maximum value.

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3 years ago
Need help with these. please show work​
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Step-by-step explanation:

3 0
3 years ago
If f(x)=x+7 and g(x)= 1 divided by x-13, what is the domain of (f•g)(x)?
andrew11 [14]
<h2>Hello!</h2>

The answer is:

The domain of the function is all the real numbers except the number 13:

Domain: (-∞,13)∪(13,∞)

<h2>Why?</h2>

This is a composite function problem. To solve it, we need to remember how to composite a function. Composing a function consists of evaluating a function into another function.

Composite function is equal to:

f(g(x))=(f\circ} g)(x)

So, the given functions are:

f(x)=x+7\\\\g(x)=\frac{1}{x-13}

Then, composing the functions, we have:

f(g(x))=\frac{1}{x-13}+7\\

Therefore, we must remember that the domain are all those possible inputs where the function can exists, most of the functions can exists along the real numbers with no rectrictions, however, for this case, there is a restriction that must be applied to the resultant composite function.

If we evaluate "x" equal to 13, the denominator will tend to 0, and create an indetermination since there is no result in the real numbers for a real number divided by 0.

So, the domain of the function is all the real numbers except the number 13:

Domain: (-∞,13)∪(13,∞)

Have a nice day!

5 0
3 years ago
Which is greater? 0.006 or 0.1
frez [133]

Answer:

0.1

Step-by-step explanation:

In a problem like this the number that is more to the left is greater. As you can see 0.1 is more to the left

5 0
3 years ago
What is the length of the base of a triangle with height 20 cm and area 150 cm2?
RSB [31]
<span>For you: Area = 150 and height = 20 


Plugging those into the formula, you get 
Multiply .5 and 20: 
To get base by itself, divide by 10 on both sides:  

The base is 15 cm.</span>
4 0
3 years ago
Read 2 more answers
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