Inequalities (<, >, ≤, ≥) compare values; solve them by adding, subtracting, multiplying, or dividing both sides.
Graphically, inequalities can be represented on a number line.
Compound inequalities combine multiple inequalities, often with "and" or "or."
Inequalities are vital for problem-solving in budgets, resource allocation, and calculus.
Solve 3x - 5 > 7: Add 5, then divide by 3, giving x > 4.
Explore etutorworld.com for in-depth inequality lessons and practice.