22-08-2018
Mathematics

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Jack is 4 years older than George. George is 10 years younger than Sally. Write a function rule that represents Jack’s age,”j”, as a function of Sally’s age, “s”.

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22-08-2018

Sally: s

George: s - 10

Jack: George + 4 --> (s - 10) + 4 --> s -6

Answer: j = s - 6

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