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aev [14]
3 years ago
10

What is a definition of complex number?​

Mathematics
2 answers:
antoniya [11.8K]3 years ago
6 0

Answer:

Step-by-step explanation:

A complex number is a number that contains a real part and an imaginary one .

Mathematical expression : a+bi xhera a and b are real numbers and i the solution of an equation like x²) -1 ..

RUDIKE [14]3 years ago
6 0

Answer:a complex number is a number that can be shown in a form a+bi when a and b are real numbers and i is the answer to the equation x^2=-1

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Divide both sides of the equation by the same term.
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Answer:

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Step-by-step explanation:

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3 years ago
A public health official is planning for the supplyof influenza vaccine needed for the upcoming flu season. She wants to estimat
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Answer:

n=\frac{0.5(1-0.5)}{(\frac{0.04}{1.64})^2}=420.25  

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The margin of error for the proportion interval is given by this formula:  

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3 years ago
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Step by step

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I'm assuming you're referring to problem 6. You are asked to find the number of x intercepts or roots, which is another term for "zero". I prefer the term root or x intercept as "zero" seems misleading. Anyways, all we do is count the number of times the graph crosses the x axis. This happens 4 times as shown in the attached image below. I have marked these points in red. The graph can directly cross over the x axis, or it can touch the x axis and then bounce back. Either way, it is considered an x intercept.

<h3>Answer: there are 4 x intercepts (or 4 roots)</h3>

7 0
3 years ago
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