the original cost of a piano is 19,100 and it is on a sale for 19% off its original price if the total l cost includes a 5% sale
2 answers:
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From this picture you can calculate coordinates of triangles' vertices:
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Answer: A is correct choice.
Since
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Answer: A is correct choice.
The correct answer is: if is a root of
, then
is also a root of
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In fact, every polynomial has real and/or complex solutions. If all solutions are real, we're good. But if not all of them are real, then the complex ones come in couple of conjugate solutions. Since and
are conjugate complex numbers, if one of them is a solution, the other must be as well.