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Rearrage equation (1) to make y the subject of the formula. This gives y = -4x -1 .

Substitute this value of y into equation (2). This gives (-4x -1)^2 +5x^2 +2x = 0 . 

Expanding out the bra...

In the First Meditations, Descartes aims to determine which of his many beliefs amount to knowledge. Descartes argues that if there is any doubt regarding the truth of a proposition, one does not know tha...

graph explanation, look at excess supply and excess demand, how increasing demand will lead to an increase in price and an increase in supply will lead to a decrease of the price. This will always converg...

In general, the main thing to remember with the perfect tense is that it is used with a completed action in the past. The imperfect tense can be used for several purposes: to describe a person's character...

A 9 mark question should be in three paragraphs. You will get one mark for each of the three criticisms identified. To gain the further six marks, you must give a satisfactory ex...