Coaching Centre
Chapter 1: Formulas and Equations Notes
Substituting into formulas and spreadsheets, solving equations from word problems, changing the subject, stopping distances, blood alcohol content and medication doses.
Sections
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1A Substitution and spreadsheets Mastered
Substituting into linear and non-linear formulas, using brackets on the calculator, rounding with units, and writing spreadsheet formulas with relative and absolute cell references.
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1B Equations and word problems Mastered
Solving linear equations with brackets, fractions and the unknown on both sides, solving after substitution, and turning a worded problem into an equation you can solve and check.
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1C Changing the subject Mastered
Rearranging linear and non-linear formulas, including y = ax² + c, by undoing operations in reverse order, then using the new formula to answer questions.
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1D Speed, distance, time and stopping distance Mastered
Average speed, distance and time with unit changes, converting between km/h and m/s, decimal hours, and how reaction distance and braking distance add up to a car's stopping distance.
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1E Blood alcohol content Mastered
Standard drinks, the BAC formulas for males and females, how long until BAC returns to zero, NSW limits, and why a formula can only ever give a rough estimate.
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1F Medication dosages Mastered
Children's doses with Fried's, Young's and Clark's formulas, doses by body weight in mg per kg, and working out how many millilitres of a liquid medicine to give.