Search over 10,000 free study notes

Firstly, we must identify the two things that we need to work out our answer. They are: How many male runners there are, and how many male non-runners there are, as once we have these, the remaining va...

We have two algebraic equations and we are trying to find what a and b can equal to fit for both situations. 

1. 6a + b = 16

2. 5a - 2b = 19

The easiest method...

This is simplified by solving common terms (the x's and the y's). Where X and Y terms can't be solved together.

Splitting it up:  

You can see 2x-x= x

and for ...

The chain rule is used when we have a function in the form f(g(x)).

For example sin(x^3). [In this case, f(x) = sin(x) and g(x) = x^3]

The chain rule says that the derivativ...

'Factorise' essentially means put into a simpler form, in this case with two sets of linear equations which would multiply out to give the quadratic equation shown above.

What we are look...