exam Maths Puzzle Numerical Ability

(3x -9)/(4x +20) . (x� +3x -10)/(6x� -12x)

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exam Other Question

A projectile is launched upward at an initial velocity of 64 ft/sec from a platform. It took 8 sec to hit ground. How tall was the platform? log base2 3x + log base2 3 = log base 2 (2x+15)