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shutvik [7]
3 years ago
7

Weightbof 72 books is 9 kg. what is thebweight of 80 such books?How many such books would weigh 6 kg?

Mathematics
1 answer:
ASHA 777 [7]3 years ago
5 0
First, you would divide 9/72 by 72/72 and would get .125. So every book weighs .125 kg. 

Then, to find how much 80 book weigh, you multiply 80 times .125 and get 10. 

Lastly, to find how many books weigh 6 kg you, keep multiplying .125 by a number until you reach 6 kg. In this case the number is 48. So 48 books weigh 6 kg. 

Hope this helped! ;D
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By solving the system of equations, we can see that the solutions are:

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Here we have the following system of equations:

x^2 - y = 7

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If we isolate the variable y in both equations, we get:

y = x^2 - 7

y = -11 + 5x

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Learn more about systems of equations:

brainly.com/question/13729904

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