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lisabon 2012 [21]
3 years ago
5

Solve: 9x2 - 30x + 20 = 0

Mathematics
1 answer:
Trava [24]3 years ago
4 0
Actually I don't know the answer but what I thing is none of the above.
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En una fiesta se desea elegir un grupo de 3 personas de entre 6 matrimonios, si dos miembros de la misma pareja no pueden ser el
LenaWriter [7]

Answer:

Hay 160 maneras

Step-by-step explanation:

Para calcular de cuántas maneras se puede seleccionar x elementos de un grupo de n elementos podemos usar la siguiente fórmula:

nCx=\frac{n!}{x!(n-x)!}

Si vas a elegir 3 personas de entre 6 matrimonios y dos miembros de la misma pareja no pueden ser elegidos, entonces podemos decir que se está eligiendo 3 matrimonios y en cada matrimonio se está eligiendo un representante.

Entonces, podemos calcular de cuántas maneras se puede escoger 3 matrimonios de los 6, así:

6C3=\frac{6!}{3!(6-3)!}=20

Adicionalmente, para cada uno de los 3 matrimonios hay 2 opciones para ser representantes. Esto significa que hay 2^3 maneras de escoger representantes en cada una de las 20 formas calculadas anteriormente.

Por lo tanto se puede formar el grupo de 3 personas de 160 maneras diferentes:

20*2^3=160

6 0
3 years ago
Write 1,054 thousand in standard form.
Agata [3.3K]

Answer:

1054

Step-by-step explanation:

1000+50+4

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3 years ago
What is the length of the hypotenuse of the triangle?
GarryVolchara [31]
15^2 + 8^2 = 225 + 64 = 289

square root 289 = 17

answer

<span>length of the hypotenuse of the triangle = 17 cm (3rd choice)</span>
6 0
3 years ago
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Choose the correct classification of 3x^2 + 2.
lara [203]

Answer:

The answer is C. Quadratic Binomial

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What is the slope of <br> y = -2/3x + 9
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Answer:

slope=m

m= -2/3

Step-by-step explanation:

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