Unit 2 · Algebra

Chapter 2.9

Which Idea Opens It? Algebra

Inside a chapter about averages you know to use averages; on the contest, nothing tells you.

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By the end

  1. 01Name the algebra idea that opens each problem from its wording alone
  2. 02Set up each problem in a few lines before computing

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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