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AlladinOne [14]
3 years ago
10

What is the value of X?

Mathematics
1 answer:
dangina [55]3 years ago
6 0

Answer:

5

Step-by-step explanation:

A^2 +B^2 =C^2

12^2 + b^2 =13^2

144+ b^2 =169

x^{2}= 25

x=5

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How many 5-digit palindromes contain only even digits?
34kurt

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Step-by-step explanation:

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Therefore, if  n  is even, there are  9×10⁽n⁻²/²⁾  palindromes; and if n is odd, there are  9×10⁽n₋²/²⁾ palindromes.  where n is number of digits.

For  n=5 , there are  9×10²=900 palindromes

3 0
3 years ago
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