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1.Isolate either x or y. in this example you can do this by moving adding y to both sides of the second equation x-y=6 becomes x=6+y 2.substitute this into the other equation 2(6+y) + y = 18 3.simplify this ...

I was asked this question in my Cambridge interview and I think it is a useful starting point to encourage students to articulate why they want to study combined 'Geography', as offered at Oxbridge, rather t...

The first ionisation energy of an element is the minimum energy required to remove a single electron from one mole of an element in its gaseous state. As you go down the group the first electron becomes easi...

First step is to multiply coefficient of first term (2) with the constant (-12) to enable us to split the middle term.2*(-12) = -24, therefore we need to find two numbers that multiply to -24, and add to giv...

Firms may grow through integration - vertically or horizontally. Both strategies ultimately increase a firm's competitive position. Vertical integration refers to the supply chain and how a company can grow ...