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aksik [14]
3 years ago
15

O carro da Vivi faz 500 km com um tanque de capacidade igual a 40 litros de combustível. Considerando esse consumo, quanto Vivi

gasta por dia para ir e voltar de sua casa ao seu trabalho, que dista 18km um do outro, abastecendo em um posto que custa R$ 5,30 o litro de combustível?
Mathematics
1 answer:
Oliga [24]3 years ago
5 0

Here we have an algebraic problem. We will find that the cost of the gas is R$16.26

Here we know that a car can travel 500km with 40L of gas.

Then we want to know how much costs to travel 36km (18 km two times), if each L of gas costs R$ 5,30.

First, we need to find how much the car can travel with 1L of gas.

To see this, we take the quotient between the distance we know it can travel with 40L of gas, we get:

500km/40L = 12.5 km/L

Now we know that the car travels 12.5 km per liter of gas.

Now let's define a variable X, which is the amount of gas that the car needs to travel 36km, we can write:

(12.5km/L)*X = 36km

Now we solve this for X:

X = (36km)/(12.5km/L) = 2.88 L

And we know that each liter costs R$ 5,30, then the cost of 2.88L is:

2.88*R$ 5,30 = R$16.26

She spends R$16.26 on gas.

If you want to learn more, you can read:

brainly.com/question/24519906

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Answer: m = 10

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3 0
3 years ago
There are 3 red marbles, 5 green marbles, and 2 blue marbles in a jar. Event A is defined as drawing a red marble from the jar o
Anastaziya [24]

P(B/A) is \frac{5}{9} in the simplest form

Step-by-step explanation:

Let us explain how to solve the problem

  • P(B|A) is called the "Conditional Probability" of B given A
  • Conditional probability is the probability of one event occurring with some relationship to one or more other events that means event A has already happened, now what is the chance of event B
  • The formula for conditional probability is P(B|A) = P(A and B)/P(A), where P(A and B) is P(A) . P(B given A occurred)

∵ There are 3 red marbles, 5 green marbles, and 2 blue

   marbles in the jar

∴ The total number of the marbles in the jar = 3 + 5 + 2 = 10

∵ Two marbles are drawn from the bag, one after the other without

   replacement

- That means red is already occurred when green is happened,

  so it is a "Conditional Probability" of green given red

  P(B/A) = P(A and B)/P(A)

∵ Event A is defined as drawing a red marble from the jar on

   the first draw

∴ P(A) = P(red)

∵ P(red) = \frac{3}{10}

∴ P(A) = \frac{3}{10}

∵ Event B is defined as drawing a green marble on the second draw

∴ P(B) = P(green)

- The number of marbles after the red is chosen is 9

∵ P(green) = \frac{5}{9}

∴ P(B) = \frac{5}{9}

- Find P( A and B)

∴ P(A and B) = ( \frac{3}{10} ) . ( \frac{5}{9} )

∴ P(A and B) = \frac{15}{90}

- Simplify the fraction by divide up and down by 15

∴ P(A and B) = \frac{1}{6}

∵ P(B|A) = P(A and B)/P(A)

- Substitute the values of P(A and B) and P(A) in the rule above

∴ P(B/A) = \frac{\frac{1}{6}}{\frac{3}{10}}

- Simplify the fraction

∵ \frac{1}{6} ÷ \frac{3}{10} = \frac{1}{6} × \frac{10}{3} = \frac{10}{18}

- Divide up and down by 2

∴ P(B/A) = \frac{5}{9}

P(B/A) is \frac{5}{9} in the simplest form

Learn more:

You can learn more about probability in brainly.com/question/10744457

#LearnwithBrainly

7 0
3 years ago
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the ratio of the number of adults to the number of students at the prom has to be 1:10. Last year there were 450 more students t
Lisa [10]

Answer:

about 48 adults , because you have to divide the 477 by 10

Step-by-step explanation:

I got this question on my test and i chose this and i got it right.

I hope this helps!! :)

4 0
3 years ago
10000000+10000000000000
alina1380 [7]

Answer:

100000010000000

Step-by-step explanation:

10000000+10000000000000=100000010000000

3 0
3 years ago
Read 2 more answers
If 6x=9y find the value of x:y.​
Ad libitum [116K]

Answer:

A complete angle is one which measures 360∘360∘.

The three angles

6x+20∘,9y+30∘,3z+40∘6x+20∘,9y+30∘,3z+40∘

add up to 360∘360∘, as per the question.

6x+20∘+9y+30∘+3z+40∘=360∘6x+20∘+9y+30∘+3z+40∘=360∘

⟹3(2x+3y+z)+90∘=360∘⟹3(2x+3y+z)+90∘=360∘

⟹3(2x+3y+z)=270∘⟹3(2x+3y+z)=270∘

⟹2x+3y+z=90∘⟹2x+3y+z=90∘

This is the required relation.

7 0
3 years ago
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