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24.5 Divided by 7 = 3.5.63-24.5= 38.538.5 Divided by 3.5 = 11

Ok so this is a typical exam questions worth around 3-4 marks depending on which exam board you are sitting with.To start solving this problem, we are looking for 2 to the power of "something" -...

x² + 4x -16 = 0 (x+2)² -20 = 0 We note that the coefficient of x² is 1 and the coefficient of x is 4. Therefore we say the that square is (x+2). This leaves us with an additional 4 from this ex...

We add probabilities when the corresponding events are alternatives, e.g. P(rolling a 4 on a pair of dice) = P(rolling a 1 and a 3) + P(rolling a 2 and a 2). These are mutually exclusive events which can'...

First, we note the centre of the circle is at the origin (0,0). Then we calculate the gradient of the line OP, the line connecting the origin to P. The gradient = change in y / change in x = (√7 - 0) / (3...