book Maths Puzzle Numerical Ability

What are the measures of supplementary angles if the ratio is 5:13?

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In a survey conducted on 3400 officers of an establishment, 48% prefer whiskey (W), 54% like beer (B) while 64% juice (J). Moreover, 28% drink W and B, 32% drink B and J, and 30% d A right triangle has one vertex on the graph of y = 3 - x^2, x > 0, and (x, y), another at the origin, and the third on the positive x-axis at (x, 0). Express the area A of the triangle as a function of x.