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2x+y-5=0, y=5-2x (put into second equation) x 2 -y 2 =3, substituting in we get, x 2 -(5-2x) 2 =3, expand, x 2 -(25+4x 2 -20x)=3, simplify, x 2 -25-4x 2 +20x=3, 0=3x 2 -20x+28, put into brackets by seperatin...

Locke founded the idea that we perceive qualities differently. He argued that primary qualities such as extension, size, shape and weight do not change when we perceive them. They are mind independent, objec...

There are three possible cases that follow prepositions: accusative, dative or genitive. The following prepositions are followed by the accusative case: bis,durch, fuer, gegen, ohne, um Example- Ich will ohn...

The most important part of an essay is making sure the points you are making are clear, and the best way to do this is with the structure. Firstly, make sure there is a clear introduction which lays out your...

a + 3b = 12, a = 12 - 3b 3(12-3b) + b = 20 36-9b + b = 20 36-8b = 20 8b = 16 b = 2 2a + 12 = 24 2a = 12 a = 6