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1 mark each for each of these points:similarities:only contain carbon atomsatoms covalently bonded to each otherlattice structuredifferences:diamond has four covalent bonds and graphite has threediamond h...

One good way to improve your essays is to use real world examples and data to backup your arguments. For example when explaining some of the advantages of a monopoly use examples from the real world. For ...

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...