0.4 Formulas and mathematical models
Unit 0 · Textbook foundations: equations, lines and systems
Ideas in this lesson
Rearrange a formula
Undo addition before dividing by a nonzero coefficient.
Fixed-fee and rate models
Separate a fixed starting amount from a constant rate per unit.
Percent models
Apply the remaining percent to the original quantity.
Combined work rates
Add work completed per unit time, then invert the combined rate.
Rearrange a literal formula
Isolate the requested variable and state the nonzero-divisor restriction.
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