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tatyana61 [14]
2 years ago
9

PLEASEEE HELLPP!!!!!!!!!!!

Mathematics
2 answers:
masya89 [10]2 years ago
6 0

Answer:

D

Step-by-step explanation:

Dimas [21]2 years ago
3 0
The answer is D .....
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ira [324]

Answer:

Juan imprimió 7 páginas a color.

Step-by-step explanation:

Llamemos "b" a las copias en blanco y negro y "c" a las copias en color.

Juan imprimió 75 páginas. En forma simbólica es:

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:

0.05b + 0.5c = 6.90   [2]

Si reemplazamos [1] en [2],

0.05(75-c) + 0.5c = 6.90

3.75 - 0.05c + 0.5c = 6.90

0.45c = 3.15

c = 7

Juan imprimió 7 páginas a color.

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2 years ago
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ValentinkaMS [17]

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Step-by-step explanation:

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3 years ago
The midpoint of RT is S(0.5, –6.25). One endpoint is T(–5.5, 2.75). What are the coordinates of R?
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<span>(6.5, –15.25) Is the answer.</span>
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Step-by-step explanation:

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