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WARRIOR [948]
2 years ago
6

Which of the following is a correct interpretation of the expression 3 - (-5)?

Mathematics
2 answers:
exis [7]2 years ago
8 0

Answer:

8

Step-by-step explanation:

3 - (-5)

so Keep Change Change...

3 + 5 = 8

vovangra [49]2 years ago
6 0

Answer: 3+5

Step-by-step explanation:

both - and -5 cancel out to a plus sign.

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13. En un pueblo, 5 personas escucharon una noticia. En una hora, cada una de ellas
Vera_Pavlovna [14]

Answer:

En 5 horas se habrá enterado todo el pueblo.

Step-by-step explanation:

Sabemos que en un pueblo 5 personas escucharon una noticia.

Una hora más tarde, cada una de ellas le contó la noticia a otras 5.

Luego, éstas contaron la noticia a otras 5 y así sucesivamente.

Nadie cuenta ni escucha la noticia más de una vez y en ese pueblo hay un poco más de 19000 habitantes.

La ecuación a desarrollar para resolver el problema es la siguiente :

Comenzamos con 5 personas que escucharon la noticia a la ''hora 0''.

Una hora más tarde, cada una de ellas le contó a 5 personas, es decir , pasada la primera hora tendremos :

5+5^{2}=30 (I)

Las 5 personas originales de la ''hora 0'' más 25 personas que se enteraron pasada la primera hora. La ecuación que planteamos es la siguiente :

5^{1}+5^{2}+5^{3}+...+5^{x}>19000 (II)

Buscamos el valor de x que satisface la ecuación (II).

Probando y realizando las sumas encontramos que :

5^{1}+5^{2}+5^{3}+5^{4}+5^{5}+5^{6}>19000

19530>19000

El valor de x que satisface (II) es x=6.

Para hallar el número de horas nos fijamos que en (I) el valor del mayor exponente del 5 es el número 2. Para ese valor 2, el tiempo que pasó es una hora.

Entonces para nuestro x=6, el número de horas que pasaron son 5 horas (1 menos que el valor de x)

Todo el pueblo se habrá enterado en 5 horas de la noticia.

7 0
4 years ago
One way to solve an equation or inequality that has both decimals and fractions is to change the
Stells [14]

Answer:

Turn everything into fractions. You can also combine like terms.

Step-by-step explanation:

3 0
3 years ago
Because hit 7 more home runs than Beverly. Because hit 22 home runs. How many home runs did Beverly hit?
nekit [7.7K]
The answer choice isn't even up there. The answer is 15. Since Because hit 22 home runs; you would just subtract to find the number of Beverly's home runs since it says "7 more home runs than Beverly".


22 - 7= 15.

Hopefully this helps 



7 0
4 years ago
Read 2 more answers
Which is larger 5/6 or 29/36
Whitepunk [10]

Answer: 5/6 > 29/36

<u>Find Common Denominator</u>

6: 6,12,18,24,30,36

36: 36,72,106

CD=36

<u>Multiply both sides by 6</u>

5/6×6/6=30/36

<u>Compare</u>

30/36 > 29/36

<u>Therefore</u>

5/6 > 29/36

6 0
3 years ago
Read 2 more answers
Can somebody help me with these to questions how do you find the area of the circle
Grace [21]

13)

Circumference (C) = 2π·r

11π = 2π·r

11/2 = r

******************************

Area (A) = π·r²

             =  π·(11/2)²  

            = 121π/4

           ≈ 94.985 in²

14)

diameter = 2r

          42 = 2r

           21 = r

*******************

Area (A) = π·r²

             =  π·(21)²  

            = 441π

           ≈ 1384.74 in²

***************************

$280/1384.74 in²

x = $0.20

Answer: about 20 cents per square inch

 



                     

6 0
3 years ago
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