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Remember that you have time to contemplate the question, re and then re-read the extract and get over that initial panic. Breaking the question up and then trying to put it into your own words is a good w...

Step 1) Write out the general equation of a straight line: y = mx + c where m is the gradient and c is where the line intersects the y-axis. Step 2) Find the gradient: m...

First write down any two factors of 36 (numbers that multiply together to give 36). Let's use 2 x 18. We now need to break these numbers down into prime factors. 2 is already a prime number, so we only ne...

It is produced by the pancreas, it acts on cells in the liver to stimulate the uptake of glucose from the blood, and its conversion to glycogen.

First we expand the brackets on the numerator and collect the terms together. We need to get rid of the square root term on the denominator, and we do this by multiplying the numerator and denominator by ...