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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...

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On top of my A levels and hobbies ^{this shows you can handle multiple things at once, which is a valuble skill at university}, I have also worked part-time at a f...

The lungs are made up of many air sacs called alveoli. The alveoli have many folds which create a large surface area.  The larger the surface area, the greater the area of alveolar cell membrane available...