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user100 [1]
4 years ago
9

It takes 28 minutes for 7 people to paint 7 walls. How many minutes does it take for 14 people to paint 14 walls?

Mathematics
2 answers:
Paraphin [41]4 years ago
4 0

Answer:

Since it takes 7 people 28 minutes to paint 7 walls, it must take 1 person 28 minutes to paint each wall. Therefore, 14 people must also take 28 minutes to paint 14 walls, as each person still paints 1 wall individually.

PSYCHO15rus [73]4 years ago
4 0

Answer:

56 mins

Step-by-step explanation: because double 7 it is 14 so double 28 = 56

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Answer:

S(x)=-0.4x+42

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Step-by-step explanation:

It is given that a chemist working on a flu vaccine needs to mix a 20% sodium-iodine with a 60% sodium-iodine to obtain a 70-milliliter mixture.

Let x be the number of milliliters of the 20% sodium-iodine.

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S(50)=-0.4(50)+42

S(50)=22

The value of S(50) is 22 in means the amount of sodium iodine in the mixture is 22 when 50 milliliters of the 20% solution used.

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Again using the Pythagorean Theorem:

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