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Solve the simultaneous equations to find x and y. 4X=8Y+24; 7Y=23-2X

To solve these simultaneous equations I will use the substitution method. This method consists of finding out the value of one of the variables (X and Y) and then substituting this value into the other equat...
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Answered by Callum O. • Maths tutor
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Define globalisation and give an example of a country which has been affected by this process

Globalisation is the process by which the world is becoming increasingly interconnected as a result of massively increased trade and cultural exchange. Globalisation has increased the production of goods and...
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Answered by Reuben T. • Geography tutor
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Using diagrams, describe the difference between Ionic, Covalent and Metallic Bonding.

Ionic bonding is the electrostatic forces of attraction between a metallic and non-metallic ion. The metallic ion has a positive charge because it loses an electron. For example, with KCl (Potassium Chloride...
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Answered by Eliza B. • Chemistry tutor
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Explain the process of osmosis and give an example of where this occurs (5 marks).

Osmosis is the diffusion of water molecules (1 mark) from a region of high particle concentration (1 mark) to a region of low particle concentration (1 mark), through a partially permeable membrane (1 mark)....
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Answered by Emily W. • Biology tutor
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Prove that the square of an odd number is always 1 more than a multiple of 4

First we need to find a general form for an odd number, so that we can prove that when we square it, it will be 1 more than a multiple of 4 regardless of which odd number it is. An even number can always be ...
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Answered by Isobel A. • Maths tutor
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