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If the equation of a curve is x^2 + 9x + 8 = y, then differentiate it.

First we must establish how to differentiate terms individually. This is done by using the simple method of multiplying the X by the power, and subtracting one away from the power. To make it easier we will ...
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If the area of a circle is 9pi cm^2, then what is the radius of this circle?

The equation of the area of a circle is A = pi*(r^2) Therefore seeing as we have got the area we must work backwards to be able to answer this question. First we shall start off with substituting into the eq...
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Answered by Tamara T. • Maths tutor
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Why should the government consider the price elasticity of demand when imposing tax on goods?

The price elasticity of demand tells you how sensitive consumers are to a change in the price of a good. Therefore the more sensitive (elastic) the demand is, the more the tax will effect the demand. So, if ...
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Answered by Tamara T. • Economics tutor
31890 Views

Expand and simplify: (2x+3)(x-8)

For this kind of question, the FOIL method can be used. You start by multiplying the FIRST aspects of both brackets, in this case giving 2x². Then you do the same with the OUTERS, the last elements in each b...
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Answered by Georgia C. • Maths tutor
17514 Views

How do I approach an unseen poem or extract in an exam context?

The first thing to prioritise in approaching an unseen piece is to understand what is actually happening in the text at a more basic level, identifying key events and characters. After establishing this, you...
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Answered by Georgia C. • English tutor
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