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Please please help i found 85.5 but the result is wrong​

Please please help i found 85.5 but the result is wrong​-example-1
User Taoufik A
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1 Answer

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Answer:

(10 × 6) + ((14 - 10)×6)/2 + 3 × (6/2)^2= 99

User Cheezey
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