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Irina18 [472]
2 years ago
11

If six women paint a fence in two days, how long does it take for two women to paint the fence?

Mathematics
1 answer:
ivanzaharov [21]2 years ago
4 0

Answer:

6 days

Step-by-step explanation:

I know this because you would divide 6 women by 3 to get two women so you would multiply the two days by 3 to get 6 days

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Donna read 18 out of 30 pages in her book.What percent of the book did she read?​
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60

Step-by-step explanation:

18 /30 is .6. So the answer would be 60 percent

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Nitrogen makes up about 78% of air. If you have 2 L of air, how many liters of nitrogen are in the air?
NemiM [27]

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Step-by-step explanation:

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Dos motos, A y B, toman la salida en una carrera de 90 km. La moto A realiza el recorrido con una velocidad media inferior en 20
aleksandr82 [10.1K]

Answer:

motorcycle A: 180 km/h

motorcycle B: 200 km/h

Step-by-step explanation:

To solve this question we need to write a system of equations for A and B, using the equation:

distance = speed * time

The speed of A is 20 less than the speed of B, so:

speedA = speedB - 20

And the time A traveled is 3 minutes (0.05 hours) more than B's time, so:

timeA = timeB + 0.05

Then, using the distance equation, we have that:

distanceB = speedB * timeB

90 = speedB * timeB

distanceA = speedA * timeA

90 = (speedB - 20) * (timeB + 0.05)

90 = speedB * timeB + 0.05 * speedB - 20*timeB - 1

90 = 90 + 0.05 * speedB - 20*timeB - 1

20*timeB = 0.05 * speedB - 1

timeB = (speedB - 20)/400

using this timeB in the distance equation, we have:

90 = speedB * (speedB - 20)/400

90 * 400 = speedB^2 - 20*speedB

speedB^2 - 20*speedB - 36000 = 0

Solving this quadratic equation, we have speedB = 200 km/h

And the speedA is:

speedA = speedB - 20 = 200 - 20 = 180 km/h

6 0
2 years ago
51-54 I dont understand help please
allsm [11]

Answer:

54

Step-by-step explanation:

54

8 0
2 years ago
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