4024/12 Oct/Nov 2020, Question 9: Expand and Simplify
Cambridge O Level Mathematics 4024 · Paper 12 (Non-calculator) · Non-calculator · 3 marks
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The question, in short
Expand and collect terms in a linear expression, then use a given ratio of two variables to work out a numerical value for a fraction.
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Part (a) · 2 marks
Multiply out both brackets and gather like terms to give a simpler expression.
- 13(3a − 4) + 2(2 − a) = 9a − 12 + 4 − 2a
- 2= 7a − 8
Answer7a − 8
Part (b) · 1 mark
Using 4x = 3y, work out the number that (8x + y) ÷ y equals.
- 14x = 3y, so 8x = 6y
- 2(8x + y)/y = (6y + y)/y = 7y/y = 7
Answer7
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Also searched as: 4024/12/O/N/20 · 4024_w20_qp_12 · 4024 w20 12 · question 9.
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