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miv72 [106K]
3 years ago
9

Given the following sets.

Mathematics
2 answers:
laila [671]3 years ago
8 0

B = {a, b, c, d}

C = {0, a, 2, b}

B ∪ C = {a, b, c, d, 0, 2}

<h3>Answer: E)</h3>

Everything from the set B and everything from the set C give to one set. Duplicated elements are written only once.

Anika [276]3 years ago
4 0

B U C means the union of the 2 sets so each it contains all the elements in both sets

Answer is E  (Note:  elements are not repeated)

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Can someone answer these!
vitfil [10]

4×2=8

9x5=45

answer: 8/45

6 0
3 years ago
Al sumar y/o restar números decimales, siempre se debe aplicar la norma de los signos. * 1 punto FALSO VERDADERO
Luden [163]

Answer:

La norma de los signos es para el producto de números reales, y la norma es la siguiente.

(+)*(+) = (+)

(+)*(-) = (-)

(-)*(+) = (-)

(-)*(-) = (+)

Es decir, el producto de dos números de mismo signo es siempre positivo

El producto de dos números de distinto signo es siempre negativo.

Particularmente, para la suma esta norma no funciona (pues no está definida para la suma)

Pero en casos como:

5 - (-4)  

(esto sería: "la diferencia entre cinco y menos cuatro")

notar que podemos reescribir esto como:

5 + (-1)*(-4)

Ahora podemos aplicar la norma de los signos:

5 + 4 = 9

Donde aplicamos la norma de los signos,  

Podemos concluir que, si bien es una regla que aplica al producto, siempre la tenemos que tener en cuenta en cualquier operación que hagamos.

Por lo podemos concluir que la respuesta correcta es verdadero.

7 0
3 years ago
Do the lines y=5x+2 and y=5x+4 intersect? if so, at what point?<br><br> Thanks for your help!!
strojnjashka [21]
They do not intersect, they are parallel lines. 
5 0
3 years ago
In a cinema theatre, why do we normally not hear echoes even though the sounds are loud?<br>​
ikadub [295]

Answer:

An echo is formed as a result of reflection of the original sound which returns to the listener. You might have experienced Echo in an EMPTY ROOM but no echo is produced after the room is occupied. To avoid echo from being  produced the echo has to be absorbed. Echo in a cinema theatre is absorbed by the WALLS of the theatre.

They are not plain. The walls are corrugated or shaped to form tiny holes or empty spaces to ABSORB the ECHO. Modern Theatre's have ABSORBENT materials sticked to the walls of the theatre.

4 0
3 years ago
Three times a number increased by 8 is no more than 24
Naily [24]

Answer:

3x + 8 ≤ 24

Step-by-step explanation:

Three times a number

3x

increased by 8

+ 8

no more than 24

≤ 24

---------------------

Altogether

3x + 8 ≤ 24

5 0
3 years ago
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