exam Maths Puzzle Numerical Ability

A hyperbola with question 25x^2 - 16y^2 = 400 has asymptotes of

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You are selling tickets for a high school play. Student tickets cost $4 and general admission tickets cost $6. You sell 525 tickets and collect @2876. How many of each type of ticket did you sell? Joel had thrice as many blue pens as black pens. When he sold 222 blue pens and 42 black pens, he had thrice as many black pens as blue pens left. How many black pens did he have a