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omeli [17]
3 years ago
7

NEED HELP ASAP!! Please show steps and answer correctly! :)

Mathematics
1 answer:
user100 [1]3 years ago
4 0

Answer:

190

Step-by-step explanation:

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Kim’s class has 16 boys and 8 girls which of the following represents the part of the class that is boys
Andreyy89

16:8 sorry i got confused but hope this helps:)

because there are 16 boys and 8 girls but you just simplify and get 2:1

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4 years ago
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What is reciprocal of 1/2
Alborosie

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Reciprocal of 1/2 is 2

Step-by-step explanation:

= 1/2

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4 years ago
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Ana ha comprado libros, todos del mismo precio, por valor de 120 euros. El librero le regala 3 libros por lo que cada libro le c
lidiya [134]

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,

Lorena ha comprado libros todos del mismo precio por valor de 120 €

x*y=120 € (1)

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

(x+3)(y-2)=120€ (2)

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

Despejamos en (1)

x=120/y

Sustituimos en (2)

(120/y +3)(y-2)=120

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

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

3y -240/y =6

y- 80/y=6

y²-80=6y

y²-6y-80=0

Resolvemos la ecuación de segundo grado

a=1

b=-6

c=-80

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:

y=12,43

Cada libro le costo 12,43€

Sustituyendo en (1)

x=120/12,43

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

x=9

Lorena ha comprado 9 libros

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3 years ago
There is a child that weighs 90 pounds and every time he eats pizza he gains 5 pounds every week if he ate pizza for 3 weeks how
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Answer: 105

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4 years ago
What is the solution to the system of equations?
dlinn [17]

Answer:

(6-1) = 5 Because Obio 6 minus 1 equals 5

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3 years ago
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