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4MA1/2F Jun 2020, Question 14: Rearranging Formulas

Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 2F (Foundation) · Calculator · 5 marks

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The question, in short

Three short algebra tasks: factorise 25f − 10, rearrange c = 5y − h to make y the subject, and solve the inequality 4x + 7 > 2.

Summarised in our own words. Use the official paper for the exact wording and any diagrams.

Part (a) · 1 mark

Factorise the expression 25f − 10.

  1. 1The highest common factor of 25f and 10 is 5
  2. 225f − 10 = 5(5f − 2)

Answer5(5f − 2)

Part (b) · 2 marks

Rearrange the formula c = 5y − h so that y is the subject.

  1. 1c = 5y − h
  2. 2Add h to both sides: c + h = 5y
  3. 3Divide by 5: y = (c + h)/5

Answery = (c + h)/5

Part (c) · 2 marks

Solve the inequality 4x + 7 > 2 for x.

  1. 1Subtract 7 from both sides: 4x > 2 − 7
  2. 24x > −5
  3. 3Divide by 4: x > −1.25

Answerx > −1.25

Stuck on a step? Read the free lesson: Rearranging Formulas

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