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There are three methods for solving simultaneous equations: elimination, substitution and by using graphs.Elimination is a good method in this case as the y terms are equal in both equations. We just add the...

First rearrange the second equation so that it's equal to y. You do this by adding x and y to both sides of the equation. You should then have y=x-1. Next you should sub y=x-1 into the first equation, x 2 +y...

Bile basically has the same function as washing up liquid, it makes it easier to break down fatty material. It is released by the liver, and stored in the gall bladder, before being released into the small i...

Poetry can be a difficult part of the GCSE curriculum because, in my experience, reading poetry isn't as common as other types of text during secondary school and so it can feel a bit daunting. There are key...

The production possibility frontier is the reflection of the maximum productive potential of an economy. Any point on the curve shows a combination of two goods that an economy can produce given that all res...