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Misha Larkins [42]
3 years ago
8

Miss SIM cut a melon into 5th she gave one piece to each of her 4 children she used equal amounts of the left over melon to make

3 fruit cups what fraction of melon did she use to make each look up
Mathematics
1 answer:
HACTEHA [7]3 years ago
3 0
The whole melon = 5/5

ONE piece went to four children, so

how much of the melon the children got = 1/5

5/5 - 1/5 = 4/5

With 4/5 of the melon, she made 3 fruit cups

4/5 / 3 = 4/5 x 1/3 = 4/15

so she put 4/15 of the melon in the fruit cups
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Answer:

El primer paso será darle un nombre a nuestras variables:

x= Numero de libros comprados inicialmente

y=Precio inicial de los libros

Ahora analizamos el enunciado,

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x*y=120 € (1)

El librero le regala 3 libros por lo que en realidad cada libro que cuesta 2 € menos

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Tenemos entonces dos ecuaciones con dos incógnitas, así que podemos resolver,

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x=120/y

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120 - 240/y + 3y -6 =120

3y-240/y =120-120+6

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y²-6y-80=0

Resolvemos la ecuación de segundo grado

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Aplicando la resolvente,

(6+- √36+320)/2

6+-√356/2

(6+-18,86)/2

Como el valor de y no puede ser negativo la unica respuesta válida será:

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x=120/12,43

x=9,65 como no puede ser un número racional

x=9

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