exam Maths Puzzle Numerical Ability

f(x)=3x, and g(x)=4x-3, find f[g(5)] and g[f(5)].

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exam Other Question

Can you please help with this equation.

A number is 7 less than 3 times a smaller number the difference between the number is 23. prove that qx^2-3x+q=0 will always have real roots independent of the value of q.