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sineoko [7]
3 years ago
10

The price of gasoline drops from $1.00 per

Mathematics
1 answer:
NNADVOKAT [17]3 years ago
8 0
-5%
lmk if it’s the wrong answer
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Diego compro un libro y tres cuadernos,pago por ellos 180 solo recuerda que el libre le costó el doble de lo que le costaron los
love history [14]

Answer: Cada cuaderno cuesta 20, y el libro 120.

Step-by-step explanation:

Vamos a definir:

L = precio de un libro

C = precio de un cuaderno.

Sabemos que Diego compro un libro y tres cuadernos por 180, entonces tenemos:

1*L + 3*C = 180

También sabemos que el libro costo el doble de lo que costaron los 3 cuadernos juntos, entonces:

L = 2*(3*C) = 6*C

Tenemos un sistema de ecuaciones:

1*L + 3*C = 180

L = 6*C

Para resolverlo, podemos reemplazar la segunda ecuación en la primera, para así obtener:

1*(6*C)  + 3*C = 180

6*C + 3*C = 180

9*C = 180

C = 180/9 = 20

Cada cuaderno costo 20.

Y el precio del libro se puede obtener con la ecuación:

L = 6*C = 6*20 = 120

El libro costo 120

6 0
3 years ago
When would a set of data be described as variable?
valina [46]
I guess when the data isn't consitant

8 0
3 years ago
What is the area of this triangle?
Alex17521 [72]
Well, you would have to mutiply the length and width and then divide that by 2 to get your area for the triangle
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Which of the following sets of ordered pairs represents a function?
Artemon [7]

Answer:

B

{(8,-9), (-8,-5), (8-7), (-8,-6)}

Step-by-step explanation:

A function can have two X values but not two Y values

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Question 15 of 20
ArbitrLikvidat [17]

72

Very simple Its pretty Blantant Its 72

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2 years ago
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