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andrew11 [14]
3 years ago
10

It takes 52 minutes for five people to paint five walls how many minutes does it take 20 people to paint 20 walls hi

Mathematics
1 answer:
AlexFokin [52]3 years ago
8 0

Answer:

52 minutes

Step-by-step explanation:

Given in question as

Men 1 = 5                                                          Men 2 = 20

Work 1 = 5                                                        Work 2 = 20

Time 1 = 52 min                                               Time 2 = T 2

Now , we can solve by equating them

i.e \frac{Men1 * Time1}{work1} = \frac{Men2 * Time 2}{Work2}

Or, \frac{5 * 52}{5} = \frac{20 * T2}{20}

Or T2 = 52 min  Answer

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A president, treasurer, and secretary, all di erent, are to be chosen from a club consisting of 12 people (whose names are I, J,
Ierofanga [76]

Answer:

There are 220 choices

Step-by-step explanation:

Given

People = 12

Selection =3 (President, Treasurer and Secretary)

Required

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This is calculated using the following combination formula:

^nC_r = \frac{n!}{(n - r)!r!}

Where

n = 12

r= 3

So, we have:

^nC_r = \frac{n!}{(n - r)!r!}

^{12}C_3 = \frac{12!}{(12 - 3)!3!}

^{12}C_3 = \frac{12!}{9!3!}

^{12}C_3 = \frac{12*11*10*9!}{9!3!}

^{12}C_3 = \frac{12*11*10}{3!}

^{12}C_3 = \frac{12*11*10}{3*2*1}

^{12}C_3 = \frac{12*11*10}{6}

^{12}C_3 = 2*11*10

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<em>There are 220 choices</em>

8 0
2 years ago
5th grade math. Correct answer will be marked brainliest. What goes in the blank box?
Naddik [55]

Answer:

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Step-by-step explanation:

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4 0
2 years ago
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yaroslaw [1]

Answer:

-|x|=-3

|x|=-3

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Step-by-step explanation:

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Hi,

So we have g(x) = 4√(x).  We're looking for g(45).  Think of it like this: whatever number is in the place of x in g(x), just place that number AS x.

Therefore, we have :
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5 0
3 years ago
Write in word problem that involves dividing by 10
tekilochka [14]
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