2 years ago

Which of the following correctly completes the square for the equation

Mathematics

1 answer:

sveticcg [70]2 years ago

4 0

The answer will be B

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2y < -4

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y < -2

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igor_vitrenko [27]

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Marta hopes to have a test average of at least 90 by the end of the marking period. Her grades on the first four tests have been

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Answer:

Marta need to score at least 94 to receive an average of 90 or higher considering all five tests.

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Let mark received in fifth test be x

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So we have

$\frac{86+84+97+89+x}{5} \geq 90\\ \\ 86+84+97+89+x\geq 450\\ \\ x\geq 94$

So Marta need to score at least 94 to receive an average of 90 or higher considering all five tests.

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