11. Formulae & Inequalities

11.1 Substitution into Formulae
11.2 Changing the Subject of a Formula
11.3 Changing the Subject When It Appears Twice
11.4 Changing the Subject with Powers and Roots
11.5 Understanding Inequalities
11.6 Solving Linear Inequalities
11.7 Double Inequalities
11.8 Inequalities on a Number Line
11.9 Graphical Inequalities
11.10 Regions Defined by Inequalities