Judy Penna. Lecture 03: Exponential Notation and Order of Operations Lecture 06: Simplifying Algebraic Expressions Lecture 07: Exponential Notation and Properties of Exponential and Scientific Notation Lecture 08: Solving Equations Lecture 13: Absolute-Value Equations and Inequalities Lecture 22: Solving by Substitution or Elimination Lecture 24: Systems of Equations in Three Variables Lecture 29: Multiplication of Polynominals Lecture 32: Special Factoring Lecture 33: Factoring: A General Strategy Lecture 35: Rational Expressions and Functions: Multiplying, Dividing, and Simplifying Lecture 39: Solving Rational Equations Lecture 46: Addition, Subtraction, and More Multiplication Lecture 50: The Complex Numbers Lecture 51: The Basics of Solving Quadratic Equations Lecture 58: Polynominal and Rational Inequalities Lecture 69: Nonlinear Systems of Equations