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blagie [28]
3 years ago
10

I need an answer to this

Mathematics
1 answer:
Ulleksa [173]3 years ago
4 0

Answer:

x=3

Step-by-step explanation:

x+1*5=20

x*5=15

15/5=3

Hope this helps! :)

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Prove: If n is a positiveinteger and n2 is<br> divisible by 3, then n is divisible by3.
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Answer:

If n^2 is divisible by 3, the n is also divisible by 3.

Step-by-step explanation:

We will prove this with the help of contrapositive that is we prove that if n is not divisible by 3, then, n^2 is not divisible by 3.

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Now, squaring

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n^2 = \frac{9x^2}{y^2}

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It can be clearly seen that the fraction \frac{3x^2}{y^2} is in lowest form.

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