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GCSE Maths | Functions

Question 1 Question 2 Question 3 Question 4 * Inverse functions * f(x) * Swap x and y * Make y the subject again * f-1(x)
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GCSE Maths | Reverse Percentages

Non-Calculator – Part 1 1. After a 20% decrease, a jacket costs £64. What was the original price? 2. A bike is sold for £72 after a 10% discount. What was the original price?