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First we will rewrite y so it is written with a power: y=1/x²-2x-1=(x²-2x-1)^-1 Now let u=x²-2x-1 => du/dx = 2x -2 Writing y in terms of u: y=u^-1 =...

A 15% increase means that the £80,000 represents 115% of the original value.

Therefore what we do is:

£80,000=£125% divided by 125 

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A detailed answer to this question would start by defining and explaining the economic term - scarcity and establishing the relationship between our infinite needs and wants and finite resources. This wou...

There are many components of fitness which would benefit an individual's performance in a 100m sprint race, however, the two which I will focus on are explosive power, and flexibility. 

Explosive p...

Answer has to be explained verbally. A full written proof can be given.