exam Maths Puzzle Numerical Ability

B is between A and D. C is between A and D. AB + BD= AD. AC+CD=AD AD+AC+CD. AB=BD=AC+CD. Complete the proof

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exam Other Question

x^3 - 4x^2 - 21x = 0 the altitude drawn to the hypotenuse of a right triangle divides the hypotenuse into two segments, whose lengths are 8 inches and 18 inches. how long is the altitude???

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