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Ronch [10]
3 years ago
11

Um estacionamento cobra pelas primeiras duas horas R$ 12,00 e mais R$1,50 horas subsequentes. Se um carro ficar estacionado n ho

ras, n > 2, quanto se pagará ao final?
Mathematics
1 answer:
Anton [14]3 years ago
6 0

Answer:

Y = 12 + 1,5n

Step-by-step explanation:

12 reais são fixos das duas primeiras horas, então para descobrir o valor final basta multiplicar o número de horas subsequentes por 1,5 (ou seja, se o carro ficou 5 horas, deve multiplicar 1,5 por 3) e somar 12

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Both the computers will take 18 minutes to do the job together.

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The faster computer completes the same job in 30 minutes.

Let's take minutes t  to complete the task together.

As they complete one job, we get the following equation:

\frac{t}{45}+\frac{t}{30}=1

LCM of 45 and 30 is:

45 = 3 x 3 x 5

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Now, solving for t;

⇒\frac{2t+3t}{90} = 1\\\frac{5t}{90} =1\\5t=90\\

Dividing both sides by 5;

\frac{5t}{5}=\frac{90}{5}

We get t = 18

Hence, it will take both the computers 18 minutes to do the job together.

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