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Katyanochek1 [597]
3 years ago
12

Round to the nearest tenth, if necessary. Question: z2 = 361

Mathematics
1 answer:
Whitepunk [10]3 years ago
7 0

The answer is option C) 19,-19

<u>Step-by-step explanation</u>:

Given, z² = 361

To eliminate the square of z, take square root on both sides

z = √361

  • The factor of 361 could not be an even number, since the last digit of 361 is odd. So, eliminate option A)
  • The option B) is a larger number and it cannot be the answer. So, eliminate it.
  • Try option C) works or not. (19)² = 19\times19 = 361 and (-19)² = -19\times-19 = 361.
  • Therefore, z = √361 = ±19. option C) is the correct answer.
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