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The introduction is the most important part of your entire essay as examiners will have already decided once they've read it which marking band they feel you belong in. As such your introduction needs ...

Price elasticity of demand is the responsiveness of demand to a change in price. (Definitions are key in economics!)1. The number and closeness of substitutes, if a good has many close (similar) substitut...

(1) 5x + 2y = 20(2) x + 4y = 13Step 1: Eliminate x or y. We do this but making either the x or y terms the same, in this example, I will make the y terms the same, by multiplying the first equation by 2.(...

The first step would be to multiply out the bracket. So, using this example we would times each item inside the bracket by 3.

As a result we would get: 3x + 12 = 18

Then we ...

I am going to assume you know what an irrational number is, given that that should have been taught right at the beginning the topic of surds. When I talk about a “rational” number, here I mean “whole num...