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MariettaO [177]
3 years ago
6

What is 50.5% of 80?

Mathematics
1 answer:
MariettaO [177]3 years ago
3 0
The answer to your question is 40.4

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Let Ebe the set of all even positive integers in the universe Zof integers, and XE : Z R be the characteristic function of E.
AnnZ [28]

Answer:

\mathbf{X_E (2) =  1}

\mathbf{X_E (-2) = 0 }  

\mathbf{\{ x \in Z: X_E(x) = 1\}  = E}

Step-by-step explanation:

Let E be the set of all even positive integers in the universe Z of integers,

i.e

E = {2,4,6,8,10 ....∞}

X_E : Z \to R be the characteristic function of E.

∴

X_E(x) = \left \{ {{1 \ if  \ x \ \  is \ an \ element \ of \ E} \atop {0 \ if  \ x \ \  is \ not \ an  \ element \ of \ E}} \right.

For XE(2)

\mathbf{X_E (2) =  1}  since x is an element of E (i.e the set of all even numbers)

For XE(-2)

\mathbf{X_E (-2) = 0 }   since  - 2 is less than 0 , and -2 is not an element of E

For { x ∈ Z: XE(x) = 1}

This can be read as:

x which is and element of Z such that X is also an element of x which is equal to 1.

∴

\{ x \in Z: X_E(x) = 1\} = \{ x \in Z | x \in E\} \\ \\  \mathbf{\{ x \in Z: X_E(x) = 1\}  = E}

E = {2,4,6,8,10 ....∞}

5 0
3 years ago
Which of the following is an example of a sample that would NOT be random?
Sloan [31]

Answer: D

"Separating the students on the list into boys and girls and choosing a sample from each group that is proportional to the size of the group."

Step-by-step explanation:

You are sampling an equal amount of boys and girls since your getting an equal sample of each gender. (Not random)

5 0
2 years ago
The fraction bar represents which equation?
Vera_Pavlovna [14]

Answer:

what equation silly

Step-by-step explanation:

3 0
3 years ago
Jessie read 1/3 of a book in the morning, and she read some more at night. By the end of the day, she still had 1/5 of the book
Mrac [35]
7/15 She read 7/15 at night
6 0
3 years ago
Read 2 more answers
riangle ABC is an obtuse triangle with the obtuse angle at vertex B. Angle A must be less than 90°. greater than 90°. congruent
Softa [21]
Angle A must be less than 90<span>°</span>
5 0
3 years ago
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