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balu736 [363]
2 years ago
12

It cost $.06 per local call and $0.15 per international call you are charged $69.84 and your calls add up to 852 minutes write a

nd solve a system of linear equations
Mathematics
1 answer:
MAVERICK [17]2 years ago
7 0

Answer: the number of minutes of local calls that you made is 644

the number of minutes of international calls that you made is 208

Step-by-step explanation:

Let x represent the number of minutes of local calls that you made.

Let y represent the number of minutes of international calls that you made.

It cost $.06 per local call and $0.15 per international call you are charged $69.84. This means that

0.06x + 0.15y = 69.84 - - - - - - - - 1

The total number of calls add up to 852 minutes. This means that

x + y = 852

Substituting x = 852 - y into equation 1, it becomes

0.06(852 - y) + 0.15y = 69.84

51.12 - 0.06y + 0.15y = 69.84

- 0.06y + 0.15y = 69.84 - 51.12

0.09y = 18.72

y = 18.72/0.09 = 208

x = 852 - y = 852 - 208

x = 644

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balandron [24]

Answer:

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densidad = 0,001976 g/cm³

Sabemos que:

densidad = masa/volumen

Entonces, si tenemos una masa de 28 g, podemos escribir:

volumen = masa/densidad

volumen = (28g)/(0,001976 g/cm³) = 14,170 cm^3

Para obtener la masa molar (es decir, la masa de un mol de esta sustancia) simplemente sumamos la masa de un mol de cada componente.

Carbono: tiene una masa molar de 12 g/mol

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3 years ago
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Answer:

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please mark brainiest

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2 years ago
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AC =<br> Round your answer to the nearest hundredth.<br> 5<br> ?<br> 35<br> B
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Step-by-step explanation:sin =opp/hyp

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Cross multiply

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