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To answer to this question, it is crucial that the students understand the difference between variable and fixed costs.Variable costs relate directly to the level of production and are dependent on it. Wh...

It has a giant lattice structure, strong covalent bonds are difficult to break etc.

In the UK system, a separation of powers is maintained between the Houses of Parliament, the legislative body, Government, the executive body; and the courts, the judiciary. This separation of powers is i...

First work out how many balloons he will need to buy. In order for each bag to have two balloons, he will need 70 balloons. Since he can buy 20 balloons at a time, this implies the mi...

There are two ways of doing this question, one would be to sketch the graphs and see which are parallel to and which are perpendicular to the original line. Whilst this is valid, sketching lines isn’t alw...