exam Maths Puzzle Numerical Ability

I need help solving this equation: 4k2=5k

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exam Other Question

The area of a rectangle is 108 cm^2. the ratio of the width to the length is 3:4. Find the length and the width. simplify - (4X�)(-2X4)�

(4x to the third power)(-2x to the 4th power)�