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First, we simply label the two equations as 'Equation 1' and 'Equation 2' respectively. So we have: Equation 1: 2x + y = 18and Equation 2: x - y = 6. In simultaneous equations, there are two variables: x ...

21.5 cm³ / 1000 = 0.0215 dm³ of HCl. n = cv so (0.050) x (0.0215) = 0.001075 mols of HCl. NaOH + HCl --> NaCl + H₂O so there is a 1:1 ratio of reactants to products. Th...

First of all, it's definitely safe to say that space is one of the play's key themes. We see it in lots of different ways - but in the broadest sense, you should notice how the play moves from a wide open...

One of the first recorded attempts to define narrative, and therefore begin to understand its associations with history, was Aristotle in Poetics[1], in which he alludes...

Okay so consider (2 + x)^-1, we can only do the expansion we know if the bracket starts with a 1, to fix this we can factor a 2 out of the bracket so that it becomes (2(1 + x/2))^-1. Then by our rules of ...