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How to find x and y in the equations (5x-2y)+(x+4y)i=10+24i and 10x- (4x-5y)i=20+17i where i = imaginary number i? Is it safe to take 30ml of DayQuil and and hour and a half later take 800mg of ibuprofen? What is the street value of 300mg codine pills? List the transformations and how do you know? y=x^2+10x+28? Why is it that the more intense exercise actually burns up less energy than the less intense one? (Physics question)?