Search over 10,000 free study notes

Supposing we have two equations x+2y=5 and 3x-y=10 and we want to find x and y we can use the following techinque. Multiply both the RHS and the LHS of the second equation by 2, giving us 6x-2y=20. Then a...

The derivative is a measure of the rate of change of f(x) as x varies. Alternatively it is the gradient of the tangent at a specific point of the graph. There are different rules for finding the derivativ...

Graphical explanation leading to the expression that we need to develop (Lim(a->0) (sqrt(x+a) - sqrt(a))/(a). Then we need to understand how to rearrange a fraction involving square roots (multiplicati...

Divide the length of the opposite side by the length of the adjacent side

The key rule is to divide the amount by the denominator and multiply by the nominator. E.g:

3/5 of 45£

divide by the denominator 45/5=9

multiply by the nominator  9*3=27