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Debora [2.8K]
3 years ago
7

Solve this math question? x-7=-19

Mathematics
1 answer:
ryzh [129]3 years ago
8 0
The answer would be -12
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Answer:

  B:  2⁷-1 = 127

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A Mersenne prime is a prime of the form 2^n -1, where n is also a prime.

Among the answer choices, neither 90=2·3²·5 nor 15=3·5 is prime. Both 2⁷-1 = 127 and 2¹¹-1 = 2047 are of the right form, but 2047 = 23·89 is a composite number.

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