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The harmonic elements that are common in 20th century music are the regular use of dissonance, and a lack of classical chord progressions. This dissonance is also unlikely to be prepared as seen with musi...

A) Since x, 12, y form a geometric sequence, we know that there exists some real number "r" (common ratio) such that 12=xr and y=12r. Hence, r= 12/x =y/12 => xy=144 => k=144 (cros...

Draw a tree diagram. Recognise that the second ball selected from bag A is dependent on the outcome of the first ball. The outcome of the ball selected from B is independent. There are 3 orders that 2 red...

x^2 - 4 consider that in any quadratic the two numbers which end up in the brackets at the end must add up to the middle term in x. they must also multiply to make the number at the end of the quadratic t...

I find the best way to prepare for either your GCSE or A level exam is to firstly solidify your knowledge on aspects you may be tested on, such as topic knowledge and grammar, and then to practice applyin...