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ladessa [460]
3 years ago
5

What is the expression for the difference between five times a number and twice that number?​

Mathematics
2 answers:
kramer3 years ago
4 0

Answer:

5x-2x

///////////////

Step-by-step explanation:

MAXImum [283]3 years ago
4 0

Answer:

5x-2x

Step-by-step explanation:

Let's call that number x.

when we are asked for a difference we must substract quantities.

In this case we need the difference between five times a number  (the number is represented by x) and twice that number:

five times the number x is equal to

x+x+x+x+x=5x

twice that number x is equal to:

x+x=2x

thus, the difference is: 5x-2x

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Answer:

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Step-by-step explanation:

From the question, we are given;

  • A room with dimensions 5.2 m by 4.3 m by 2.9 m
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We are required to determine the time taken to exchange the air in the room;

First we are going to determine the volume of the room;

Volume of the room = length × width × height

                                  = 5.2 m × 4.3 m × 2.9 m

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Then we should know, that 1 m³ = 1000 L

Therefore, we can convert the volume of the room into L

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But, the rate is 1200 L/min

Thus, time = Volume ÷ rate

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                   = 54.0367 minutes

                   = 54 minutes

Therefore, it would take approximately 54 minutes

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