exam Maths Puzzle Numerical Ability

Find (fog)(x) if f(x) =2x-1 and g(x) =x-2

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exam Other Question

find 3 consecutive integers such that the square of the third exceeds the sum of the secod and the square of the first by 42 Can someone help me on this problem?

I need to graph the solution set of the following inequalities:

x > 4
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Thanks,
Lyn