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Vaselesa [24]
3 years ago
7

It takes 45 minutes for 4 people to paint 5 walls.How many minutes does it take 6 people to paint 4 walls?

Mathematics
1 answer:
vodka [1.7K]3 years ago
4 0
   45 min. - 4 peoples - 5 walls 
     ? min. - 6 peoples - 4 walls
-------------------------------------------
180 min. - 1 man - 5 walls ⇒
  36 min. - 1 man - 1 wall ⇒
    6 min. - 6 peoples - 1 wall ⇒
  24 min. - 6 peoples - 4 walls (answer)

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Serga [27]

Answer: the length of Maria's piece of string is 45 inches.

the length of Katy's piece of string is 39 inches

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Let x represent the length of Maria's piece of string.

Let y represent the length of Katy's piece of string.

When they put the two pieces of string together end to end, the total length is 84inches. This means that

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3 years ago
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R is symmetric if (x,y)∈R → (y,x)∈R.   Let's check.

(x,y)∈R  so

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