GCSE · Formulae & rearranging

Substituting into formulaeExam-style questions

Why substitution is "replace the letter, keep the structure", why negatives must go in with brackets, and why the order of operations still rules once the numbers are in.

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15 questions · GCSE (Higher) level · mark scheme and worked solution on each · no sign-up to try

DifficultyAllLevel 1Level 2Level 3Level 4Level 5
  1. 1
    The formula for converting a temperature CC (in °C) to FF (in °F) is

    F=9C5+32F = \dfrac{9C}{5} + 32

    (a) Work out the value of FF when C=−40C = -40.

    (b) Work out the value of CC when F=212F = 212.
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