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1. Replace y with x + 3. x^2 + 2(x+3) = 9
   2) Expand the bracket, and subtract 9. x^2 + 2x - 3 = 0
   3) Factorise the quadratic(x - 1)(x + 3) = 0
   4) Therefore, x has 2 solutions. x = 1 and ...

In pure metals the atoms are all the same size , hence the layers of atoms can slider over each other. However, in an alloy the different size atoms distory the layers in the structure hence it is difficu...

Let’s first start by looking at some terminology that will help us to understand this verb a lot better: the terms “subject” and “object”. The subject of a sentence is the person/thing that carries out an...

First, lets find 1%. TO do this, divide 654 by 100. This is because 654 is 100%, so 654/100 is 100/100% = 1%. Now that we have 1%, multiply this by 87 to find out what is 87%.

This should be a discussion with the student rather than having a particular correct answer. However, a student will be following the right path by first discussing what is meant by 'just' and 'effective'...