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If you know how to multiply fractions, then dividing fractions only involves two more simple steps! 

1. Turn the division sign into a multiplication sign.

2. Flip the last f...

To solve these simulataneous equations we need to use substitution:If 2x + y = 13 then y = 13 - 2xTherefore 3x - y = 12 can be rewritten as 3x - (13 - 2x) = 12We can expa...

If we first calculate 30% of £4 to work out how much the price of the book has been reduced by.10% of £4 is £0.40. We know 30% will be this value multiplied by 3. Therefore 30% of £4 is £1.20.Now that we ...

As this is a right angle triangle, we need to use Pythagoras's Theorem. 

This says that the length of the longest side of a right angle triangle (the hypotenuse) is equal to the sqaure ro...

Let log a be some number A and log b be some number B

now the natural log of something is the equivalent of saying a=e^A and b = e^B

So a*b = e^A * e^B which by rules of ind...