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First we realize that the question asks IF there is a solutionLet us start with the simplest equations, x+y=3 and 2x+y=5By subtracting the first equation from the second we see x=2 and subbing into x+y=3 we ...

In German, there are lots of different ways to say ‘to’: ‘nach’, ‘zu’, ‘in’ etc. Unfortunately, you do just have to learn when to use each one by memorising the rules. Learning individual examples also helps...

when the water potential of the blood is too low (1) * This is detected by receptors in the hypothalamus (2)* the pituitary gland in the brain then secretes more ADH (3) * ADH increases the permeability of t...

Planning in an exam is really important to ensure you have a structure of argument to refer back to. Due to the limited time available, your planning should be quick and to the point. A good way of doing thi...

First of all, as with every question, we need to write down the information we have. so we know that y is 20% bigger than x meaning y=1.2x. this is because to increase x by 20% you need to multiply by 1.2 wh...