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Darwin made four key observations in his studies of wild populations: members of a population of the same species vary in their traits; traits can be inherited, or passed from parents to offspring; popula...

In order to solve this problem we must first complete the square. To complete the square we need to factorise the equation to get the coefficient of x to be 1. This gives: 2(x^2-3x)+5. We then need to com...

The Vietnam War was a humiliating defeat for America. It was the first televised war which significantly changed how the U.S. public viewed international conflict and has remained an embarrassing debacle ...

Here the best method to use will be elimination since using a substitution for x or y may produce some nasty fractions. The first thing to look for is that the 2x and 4x are nice multiples of each other. ...

Context is an important part of the mark scheme and therefore is vital in your essay. However, you don't want to randomly include context, it is better to see how context arises from the text. Begin by an...