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tino4ka555 [31]
3 years ago
13

Can someone help me with this?

Mathematics
1 answer:
Damm [24]3 years ago
3 0

Answer:

<h2>780</h2>

Step-by-step explanation:

What is the sum of the series 5^n from n=1 to 4.

5^1 + 5^2 + 5^3+ 5^4 =

5 + 25 + 125 + 625 =780

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ira [324]

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Juan imprimió 7 páginas a color.

Step-by-step explanation:

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b + c = 75  

b = 75 - c   [1]

El costo de impresión de cada página en una biblioteca es de 5 centavos si es en blanco y negro o  50 centavos si es a color. En total pago $6.90. En forma simbólica es:

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Si reemplazamos [1] en [2],

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0.45c = 3.15

c = 7

Juan imprimió 7 páginas a color.

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