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There are three things to think about when sketching a quadratic graph: whether its a 'u' or 'n' shape, where it cuts across the y axis and where it cuts across the x axis (if it does). Let's look at an e...

The mean height of all the students is 1.48m which means that the total height of all the students is 30 * 1.48m = 44.4m. The contribution due to the boys is 14 * 1.52m = 21.28m. Therefore the total heigh...

There are several ways to approach source questions, but the most effective way is to give an overall summary of the source followed by an analysis of 3 points the source makes.
1) Read the source an...

2s = d/t. Multiply both sides of the equation by t to give 2ts = d. Then, divide both sides of the equation by 2s to give t = d/2s.

An adverse socio-economic consequence of population movements for source countries across Europe is the brain drain. The brain drain is a geographical term which is used to explain the socio-economic phen...