exam Maths Puzzle Numerical Ability

Solve by completing the square. Show your steps: 2x^2 - 3x + 5 = 0

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exam Other Question

When a rock is dropped from a cliff into an ocean, it travels approximately 16t squared feet in t seconds. If the splash is heard 4 seconds later and the speed of sound is 1100 ft/sec, approximate the height of the cliff. If y is directly proportional to x and inversely proportional to the square of z, and if y=0.384 when x=6 and z=5, find the constant of variation.