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After having read the text at least a couple of times to familiarise yourself with it, divide it into sections and examine how it is built.

Firstly, look at where the introductory, core and cl...

(Equation 1) 5x + 2y = 20 (Equation 2) x + 4y= 13
As we know the values for x and y are the same in both equations, we can use them to find out the values for both, In order to do this we need to tak...

Leaching from the excessive use of fertilisers causes a nutrient build up in neighbouring rivers or lakes. As a result of the increased nutrients plants within the lake or river grow rapidly, including al...

The main parts of the digestive system are the...

- mouth

- oesophagus

- stomach

- liver

- gall bladder

- panc...

A salt is an ionic compound which is made up of two groups of oppositely charged ions.
The overall compound of a salt compound must have an overall electrical charge of 0.
Ammon...