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Firstly, I will provide a 'mark scheme' type answer.

Then there is a full explanation available underneath.  4 (x-5)=x+7. 4x-20=x+7. 3x=27. x=9. A full explanation: 4(x-5)=x+7 (expand the equation ...

Okay so let's say that the equation of the line you are given is y=2x+3 and you are told this new line must pass through the coordinates (2,4). The first thing we need to do is check we understand every b...

Advantage: Experiments allow you to control variables which affect the dependent variable, so that it is easier to ensure that observed effects are caused by the independent variable, rather than any extr...

covalent

Homeostasis can simply be described as the maintenance of a constant internal environment. Human bodies must get rid of accumulating toxic substances which can harm the body. Things like sugar concentrati...