C.) is the best answer others are less then 50%.
C.) $35 is $15 more then 20 this is over 50%
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Answer:

Step-by-step explanation:
{x -4y = −21
{8y - x = 45
_________

[Plug this back into both equations above to get the x-coordinate of 3]; 
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Answer:

Step-by-step explanation:
we know that
To find the conjugate complex of a complex number, simply change the sign of the imaginary part of the complex number
In this problem we have

so
the complex conjugate is equal to

Answer : r = 4$
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