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Grade 10 · Equations & Inequalities
Literal Equations: Changing the Subject of a Formula
MEMORANDUM
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Mark
  / 16

Answer all questions. Show all your working — marks are awarded for method as well as the final answer. Teacher copy: accept any correct equivalent method.

  1. 1
    Make x the subject: y = 2x + 6
    (2)
    x = y − 62✓✓ (2)
  2. 2
    Make x the subject: y = 5x − 3
    (2)
    x = y + 35✓✓ (2)
  3. 3
    Make b the subject: A = 12bh
    (2)
    b = 2Ah✓✓ (2)
  4. 4
    Make h the subject: V = lbh
    (2)
    h = Vlb✓✓ (2)
  5. 5
    Make r the subject: C = 2πr
    (2)
    r = C2π✓✓ (2)
  6. 6
    Make r the subject: A = πr2
    (2)
    r = A ÷ π✓✓ (2)
  7. 7
    Make x the subject: ax = bx + c
    (2)
    x = ca − b✓✓ (2)
  8. 8
    Make t the subject: v = u + at
    (2)
    t = v − ua✓✓ (2)
TOTAL: 16 marks
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