exam Maths Puzzle Numerical Ability

Given f(x) = 3x + 3, find f(a + 1).

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exam Other Question

Which is the negitive -|4| or |-4| I have no idea. Thanks Solve each of the following systems by using either addition or substitution (kind of like in Example 5 on p 715). If a unique solution does not exist, state whether the system is