How to find the number of combinations of a set.
How to define joint and combined variation.
How to know when to use combinations or permutations.
The combined law for gases.
How to simplify expressions by distributing and/or combining like terms.
Combining capacitors and resistors in electric circuits.
Recognizing and understanding synthesis reactions.
How to add or subtract polynomials.
How to use the fundamental counting principal.
How to define a composition of transformations; how to perform a composition of translations.
How to solve multi-step equations.
How to solve equations with the same variable on both sides.