Search over 10,000 free study notes

Let (1) be 4x + 2y =20 and (2) be 8x + 6y =45.First we want to eliminate either x or y so that we have an equation in terms of only one unknown. Lets eliminate x. If we multiply (1) by 2 we have2(4x + 2y)...

(2n+3)^2-(2n+1)^2 4n^2+12n+9-4n^2-4n-1 8n+8 8(n+1), which is a multiple of 8

The easiest way to do it is by using a simple equation. You know that the number N you want to find the percentage of is the "total", which means it is 100%. Let's call X the result of the perce...

Structuring your essay answer correctly is an important habit to adopt when trying to get the top band marks for your answers. The best way to structure an essay would be to start with what sides you are ...