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Solve the simultaneous equations y = x^2 - 6x and 2y + x - 6 = 0

Rearrange the second equation in terms of y: meaning that the equation is of the form y = ....-this will give y = 3 - x/2You may now substitute the y in the left hand equation with what y in the right hand e...
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Answered by Tabi D. • Maths tutor
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Express (4x)/(x^2-9) - (2)/(x+3) as a single fraction in its simplest form.

First we must expand the demoninator to; (x+3)(x-3)Then we can multiply the left hand fraction on top and bottom by (x-3) to get a common demoninatorthis gives us; (4x)/((x+3)(x-3)) - ((2)(x-3))/((x+3)(x-3))...
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Answered by Eddie E. • Maths tutor
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Find the coordinate of the stationary point on the curve y = 2x^2 + 4x - 5.

The important point in the question is the term 'stationary point'. This is where the graph of y will 'flattern out'. If we look at this graph, we can say that the gradient is equal to 0 at this point. There...
SM
Answered by Serkan M. • Maths tutor
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Outline a factor that has led to globalisation

Globalisation is the growing integration of the world's economies. One factor that has enabled globalisation to take place is the reduction in international trade barriers. This is because over the last deca...
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In which ways are the lungs adapted for efficient gas exchange?

There are three main ways in which the lungs are adapted for efficient gas exchange. These are: the fact that structures in the lungs called alveoli provide a large surface area for gas exchange. Also, the l...
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Answered by Holly M. • Biology tutor
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