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oee [108]
3 years ago
13

When this 3 digit number is rounded to the nearest hundred it rounds to 900. The digit in the ones is the fifth odd number you c

ount beginning with one. The sum of the digits is 22. What is the number?
Mathematics
1 answer:
garri49 [273]3 years ago
3 0
859....9 is the 5th odd and you know the number is in the 800s so just add 9 and 8 and subtract from 22 and you get 5
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Does 23^-1 (mod 1000) exist? If yes solve it.
sweet [91]

Yes, 23 has an inverse mod 1000 because gcd(23, 1000) = 1 (i.e. they are coprime).

Let <em>x</em> be the inverse. Then <em>x</em> is such that

23<em>x</em> ≡ 1 (mod 1000)

Use the Euclidean algorithm to solve for <em>x</em> :

1000 = 43×23 + 11

23 = 2×11 + 1

→   1 ≡ 23 - 2×11   (mod 1000)

→   1 ≡ 23 - 2×(1000 - 43×23)   (mod 1000)

→   1 ≡ 23 - 2×1000 + 86×23   (mod 1000)

→   1 ≡ 87×23 - 2×1000 ≡ 87×23   (mod 1000)

→   23⁻¹ ≡ 87   (mod 1000)

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3 years ago
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Neporo4naja [7]

Answer:

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Step-by-step explanation:

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7 0
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solong [7]
How much does each bamboo plant cost. This is impossible to solve without knowing the cost. I you have the cost i would be happy to help.
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3 years ago
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EastWind [94]


No they wouldn't be the same because, the perimeter is adding all sides.

The square has 4 sides so you would add 9, four times.

9 + 9 + 9 + 9 = 36

And a pentagon has 5 sides so you would add 9, five times.

9 + 9 + 9 + 9 + 9 = 45

So, they are not the same.

Hope this helps. :)

4 0
3 years ago
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⇒ 16 gallons
3 0
3 years ago
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