exam Maths Puzzle Numerical Ability

y = 2x^3 + ax^2 + b

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exam Other Question

How do I solve by using a system of two equations in two variables?

Five years ago, Tom was one third as old as his father was then. In 5 years, Tom will be half as old as his father will be then. Find their ages now.
Solve each of the following inequality. Express your final answer using inequality.

-22<2z-4<0