Search over 10,000 free study notes

As the tangent meets the circle at P, when x =1, we can assume that the y value will be the same for this value of x. therefore we substitute x=1 into the equation of the cirlce. Rearranging the equation ...

i) (5 x 4) -12 = 8 ii)  5(x + 1) - 12 5x + 5 -12 5x - 7

We need to start by translating the sentences into algebraic equations. There are 2 unknowns, Christine’s money and David’s money. Let Christine’s money= x Let David’s money = y If Christine gave David £3...

Remember that both sides of the equation need to 'balance', so any changes that we make to the right hand side must also be made to the left hand side. 

Let's start by getting rid of the '5' on the...

There are 2 easiest and quickest ways to approach this question:

1). By elimination:

When using the elimination method, you want to make sure that you choose the correct varia...