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For this question, and all other unseen analysis questions, I think it's important to approach the analysis of the poem in a certain order. You should begin by establishing the bigger ideas, as your answe...

This is a simultaneous equation problem.If 4x = 9y then 2x = 4.5y.Then by substitution, 4.5y + 5y = 95.Then 9.5y = 95 (divide by 9.5) gives y = 10.By using back substitution 2x = 4.5*10 = 45 (divide by 2 ...

f(x) = 2 - cos(3x)integrate function x term2 -> 2x (raise power of x then divide by new power for polynomial functions of x) -cos(3x) -> -(1/3)(sin(3x)) (using a substitution of 3x = u, then cos(u) ...

Remember here that there are two things that examiners like to see: knowledge and skill. Focus your revision separately on these two things and then bring them together to give a great answer.
To rev...

The overall reaction is 2I^-_(aq) +2H₂O_(l) --> I_2(aq) + H_2(g) + 2OH^-_(aq), the anode reaction is 2I^-_...