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Identifying metre can be tricky, since it is sometime quite subtle. However, the easiest way to find the metre is to read the text out loud, placing additional emphasis wherever it feels natural. This wil...

Substitute y = 2x - 1 into the first equation.

2x + 3(2x -1) = 21

2x + 6x - 3 = 21

8x = 24

x = 3

Therefore y = 2(3) - 1 = 5

For convience we can call the polynomial f(x). Using the fact that the product of the roots of a polynomial equals the constant term, we know that the product of the roots is -15. We can therefore guess a...

Brady's reagent is an orange solution of 2,4-dinitrophenylhydrazine which reacts with carbonyl containing functional groups to produce an orange precipitate (2,4-dinitrophenylhydrazone derivative of the c...

The doctrine of precedent stipulates that, unless they clash with statute, decisions of the highest court with respect to a specific legal matter, are bound upon lower courts, as well as the courts in whi...