4024/12 May/Jun 2020, Question 11: Substitution
Cambridge O Level Mathematics 4024 · Paper 12 (Non-calculator) · Non-calculator · 2 marks
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The question, in short
Substitute given values into two formulas and calculate the resulting value of c and of y.
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Part (a) · 1 mark
Work out c using c = (7 − a)/b with a = −4 and b = 2.
- 1c = (7 − (−4))/2 = 11/2
- 2c = 5.5
Answer5.5
Part (b) · 1 mark
Work out y using y = 5ˣ + 1 with x = −2.
- 1y = 5⁻² + 1 = 1/25 + 1
- 2y = 1 1/25
Answer1 1/25
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Also searched as: 4024/12/M/J/20 · 4024_s20_qp_12 · 4024 s20 12 · question 11.
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