exam Maths Puzzle Numerical Ability

1} x+2y=1

2} 2x+y=5

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exam Other Question

The function that realtes to the Cost($) of an oil well toits depth (x) in feet is as follows:


C(x)= -146,983 = 58.72*x
Find and interpret C(3500)



Thank you.
(7-4i)-(-3+6i)