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First consider each equation separately and label them with a number. x2 + y2 = 25 (1) y - 2x = 5 (2)This question is difficult as it involves squa...
y2 + 27y = y(y + 27)To factorise you need to find the common factor between each part of the equation. In this case y is common between the different parts of the equation. Therefore you take y...
a) First sweet you pick will be soft centred in 7 out of 11 cases, so the probability is 7/11when you are picking up a second sweet there are only 6 hard centred left and a total of 10, so the probability...
First find 10% which is £55Next find 1% which is 55/10 = £5.50As 12% = 10% + 1% + 1%,12%= £55 + £5.5+ £5.5= £66
In 1 there are 3 thirds so in 9 there will be 3x9 thirds which is 27 thirds.
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