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2x + 5y =33 x+3y = 19
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Answered by Sen H. •
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a) Factorise the following expression (x^2)-49 b) Differentiate the following equation y = (x^2) - 49 and find the stationary points of the equation
2a + 6b = 24, 3a + b = 20
In year 11, 3/7 of pupils go on holiday abroad in the summer break. Out of these, 1/3 go to France. Determine the ratio of pupils who go to France in summer to pupils who do not go to France in summer.
Let n be an integer greater than 1. Prove that n^2 - 2 - (n-2)^2 is an even number.
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