Book Maths Puzzle Interview

I NEED HELP WITH THIS PROBLEM!!!


2y^2-6y-8=0 PLEASE HELP ME SOON!!!

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Book Other Question

Mark paid $26 for a CD player that was listed for $40. What rate of discount did he recieve?
Solve each set of linear equations by any method for x and y

7 = x + 6
2y - 4x = 6