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When solving simultaneous equations there are several options, the two most common methods being substitution and elimination. For this example I shall use elimination. In order to do so, either x or y must ...

To explain this to a student, I would start by explaining the general formula for a quadratic equation, (ax^2 + bx + c = 0). Then I would show using an example, how the a,b and c can be substituted with numb...

Cl is very electronegative, which makes it electron withdrawing. This means the three Cl substituents pull electrons from the O-H bond. This causes further polarisation of the O-H bond, which means there is ...

Before answering this question it is necessary to consider the three branches of government: the executive, judiciary and the legislature. This enables us to evaluate the checks put on those in power, and th...

You would use Pythagoras theorem, which states, a^2 + b^2 = c^2. Where a is the opposite side to the angle, b is the side adjacent to the angle and c is the hypotenuse. So if a = 3 cm, and b = 4 cm, c^2 woul...