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3 years ago

it takes 545454 minutes for 444 people to paint 666 walls. How many minutes does it take 666 people to paint 777 walls?

Mathematics

2 answers:

Natali [406]3 years ago

4 0

Answer:

42 minutes

Step-by-step explanation:

I think this problem should read:

"If it takes 54 minutes for 4 people to paint 6 walls. How many minutes does it take 6 people to paint 7 walls?"

The fewer people working, the more time it takes, so to go from more people to fewer people, multiply the time to give a larger number. To go from fewer people to more people, divide the time to give a smaller number.

The more walls, the more time it takes, so to go from fewer walls to more walls, multiply the time to give a larger number. To go from more walls to fewer walls, divide the time to give a smaller number.

"it takes 54 minutes for 4 people to paint 6 walls"

then

it takes 9 minutes for 4 people to paint 1 wall (1/6 of the walls in 1/6 of the time)

and

it takes 36 minutes for 1 person to paint 1 wall (1/4 of the people take 4 times longer)

then

it takes 252 minutes for 1 people to paint 7 walls (7 walls take 7 times the time of 1 wall)

and

it takes 42 minutes for 6 people to paint 7 walls (6 people work 6 times faster than 1)

irina [24]3 years ago

3 0

Answer:

230

Step-by-step explanation:

First calculate how long it will take one person to paint one wall.

It will take 1/3 of the time to paint one wall. So it will take 46/3 minutes for 10 people to paint one wall.

For only one person, it will take 10 times as long, so it will take 46/3 * 10 =460/3 minutes for one person to paint one wall.

So, the number of minutes it will take for one person to paint 6 walls is 460/3 * 6= 920 .

The number of minutes it will take for 4 people to paint 6 walls is 920÷4=230

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Answer:

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Step-by-step explanation:

Solution:-

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P[X = x] = n!/(x!(n-x)!) * p^x * (1-p)^(n-x)

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P[X = x] = 0 for any other value of x.

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- The mean of the binomial distribution is n * p = 20

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3 years ago

WHAT IS THE AREA OF TRIANGLES?

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3 years ago

Read 2 more answers

(4x-3)(2x^2-7x+1) what is the product of this please help!

goblinko [34]

Answer:

$8x^{3}-34x^{2}+25x-3$

Step-by-step explanation:

In order to solve this problem, lets take the two terms in the binomial (4x and -3) and, for each one, multiply them by each term in the trinomial (2x^2, -7x, and 1):

$(4x-3)(2x^{2}-7x+1)$

$(4x*2x^{2})+(4x*-7x)+(4x*1)+(-3*2x^{2})+(-3*-7x)+(-3*1)$

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Let's combine like terms to get our final answer:

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3 years ago

Use the Venn diagram to calculate probabilities. Circles A and B overlap. Circle A contains 15, circle B contains 10, and the in

grin007 [14]

Answer:

$(B) P(B)=\dfrac{16}{31}$

Step-by-step explanation:

From the Venn diagram, n(AUB)=31

The given probabilities in the option are calculated below:

$P(A)=\dfrac{21}{31}\\\\P(B)=\dfrac{16}{31}\\\\P(A|B)=\dfrac{P(A\cap B)}{P(B)}= \dfrac{6/31}{16/31} =\dfrac{6}{16}=\dfrac{3}{8} \\\\P(B|A)=\dfrac{P(B\cap A)}{P(A)}= \dfrac{6/31}{21/31} =\dfrac{6}{21}=\dfrac{3}{7}$

The only correct option is the probability of B which is $\frac{16}{31}$

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3 years ago

Help plz ?????????????

Lyrx [107]

Answer:

3443

———— =<u><em> C. 202</em></u>

Step-by-step explanation:

Step 1 :

3443

Simplify ————

Final result :

3443

———— = 202.52941

Processing ends successfully

plz mark em as brainliest :)

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