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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...
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Answered by Serkan M. • Maths tutor
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write (x+2)(x+3)(x+5) in the form ax^3+bx^2+cx+d

First take (x+2)(x+3) and expand to get x 2 +3x+2x+6, which can be simplified to equal x 2 +5x+6.Then mutiple x 2 +5x+6 by (x+5). This will give you x 3 +5x 2 +5x 2 +25x+6x+30. Simplify this to equal x 3 +10...
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Answered by Cora H. • 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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How do you know whether a compound is ionic or covalent and how can you find the conductivity rate for both heat and electricity?

As a general rule metals bind to non-metals ionically, and non-metals to non-metals bind covalently. For example NH3 is covalent, vs NaCl is ionic. Conductivity rates for electricity are in general dependent...
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Answered by Roshan S. • Chemistry tutor
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