Unit 2 · Algebra

Chapter 2.1

Choosing the Unknown

The hardest step in a word problem is usually the first one: deciding what to call x.

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By the end

  1. 01Translate a word problem into equations with as few unknowns as possible
  2. 02Choose unknowns that keep the equations linear
  3. 03Combine equations to reach the quantity asked without solving for everything

In unit 2

  1. 2.1Choosing the Unknown
  2. 2.2Rates, Ratios, and Percents
  3. 2.3Averages Are Totals in Disguise
  4. 2.4Factor Before You Compute
  5. 2.5Quadratics and Their Roots
  6. 2.6Arithmetic and Geometric Sequences
  7. 2.7Sequences Built From Their Past
  8. 2.8Functions, Graphs, and Absolute Value
  9. 2.9Which Idea Opens It? Algebra
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