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monitta
3 years ago
6

20 points each math answer with optional explination

Mathematics
2 answers:
fenix001 [56]3 years ago
6 0
<h2>Answer:</h2>

[D] <u>The coefficient of the x²-term must be positive</u>.

It is because <u>quadratic equation</u> must be in form ax² + bx + c where a, b, c are integers.

Kisachek [45]3 years ago
4 0
I believe it is B. Correct me if I’m wrong.


I hope this helped!

I would appreciate it if you gave me a Thanks and a brainliest (:
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Hello!

An observational study is one where the investigator has no control or intervenes on it. He just defines the variable of interest and merely collects and documents the information. These types of studies are usually made as precursors to a more formal experimental study, to have an idea of what's to be expected from the population.

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I hope it helps!

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3 years ago
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3 years ago
Read 2 more answers
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