exam Maths Puzzle Numerical Ability

A roll of wire 105cm long wraps exactly three times around a triangular piece of wood. If the triangle has sides with lengths 2x cm, 5x-3 and 3x+8cm, find the dimensions of the triangle.

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exam Other Question

a man invested $6000, part of it at 5%simple interest and the rest at 7% simple interest. If his annual interest income is $372, how much did he invest at each rate? Solve by using the quadratic formula. Express your answer in simplified radical form.
x^2 = 3x + 1