Lindsey bought 5 packages containing 4 bracelets in each. She plans to decorate the bracelets and then sell them for $3 each. Ho
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A complex number has a real and an imaginary part
is a complex number
A complex number is represented as:
Where:
<em /><em> real</em>
<em /><em> imaginary</em>
<em />
By comparing the options to ;
and
are not complex numbers
This is so because they do not have imaginary parts
However,
is a complex number
Because; 9i is imaginary
Read more about complex numbers at: