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Please answer both a and b and show all working out. Thank you!!! Question 4 [7 marks] The average (A) of two numbers (x and

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Please answer both a and b and show all working out. Thank you!!!

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Question 4 [7 marks] The average (A) of two numbers (x and y) is found by adding the numbers together and dividing the total by two, as shown in the formula below: A = _ xty 2 (a) Using fraction operations, find the average of x = = and y = = [3] showing full sequential working. (b) Rearrange the given formula to make x the subject. [2]

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