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cestrela7 [59]
3 years ago
13

Pls help!! match the percentages

Mathematics
1 answer:
Arte-miy333 [17]3 years ago
3 0

Answer:

Carbon dioxide: 0.04%

Oxygen: 28% (It says 21% online but there's no 21% so I'm guessing that it would be 28% because that is the closest number.)

Nitrogen: 71% (It says 78% online but there's no 78% so I'm guessing that it would vbe 71% because that is the closest number.)

Argon: 1% (It says 0.93% online but if you round up 0.93% it would round up to 1%.)

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What 3 consecutive even numbers added together equal 42?Use the equation n+(n+2)+(n+4)
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Let us assume the first even number = n
The second consecutive even number = n + 2
The third consecutive even number = n + 4
The addition of the three consecutive even numbers is 42 and it is already given in the question. Based on the information's given in the question, the answer can be easily deduced.
Then, the equation can be written as
n + (n + 2) + (n + 4) = 42
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3n = 42 - 6
3n = 36
n = 36/3
   = 12
So
The first even number = 12
The second consecutive even number = n + 2
                                                               = 12 + 2
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The third consecutive even number = n + 4
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So the three consecutive even numbers are 12, 14, 16.
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