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andrew-mc [135]
3 years ago
8

A building across the street casts a shadow that is 24 feet long. your friend is 6 feet tall and casts a shadow that is 4 feet l

ong. what is the hieght of the building
Mathematics
1 answer:
julsineya [31]3 years ago
3 0
I think the answer would be 12
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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
Anelle subtracts –4 from a number. The result is 2. What is the number?<br> –6<br> –2<br> 2<br> 6
Lynna [10]

Answer:

the answer is 2. so it is 2

Step-by-step explanation:

2 ➕ 2 is 4

8 0
3 years ago
Read 2 more answers
Can someone help me With This
natali 33 [55]

Answer:

D

Step-by-step explanation:

Find out if they match in all of them

Hope this helps

8 0
3 years ago
A ramp leads up to a building. The top of the ramp is 6 feet above the ground, and the bottom is 16 feet. What is the length of
andre [41]
We could use the Pythagorean theorem for this kind of problem I think:
A^2 + B^2 = C^2
6^2 + 16^2 = C^2
36 + 256 = C^2
292 = C^2
17.08 = C
C = 17.1 to the nearest tenth
Sorry if it’s wrong and glad I could help if it’s right ❤️❤️ Take care!
7 0
3 years ago
What is the solution to y=-x-6 and y=x-4
xz_007 [3.2K]

Answer:

(-1,-5)

Step-by-step explanation:

Solve by substitution

7 0
2 years ago
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