Предмет: Математика, автор: lysenkovictoriya

Середнє арифметичне трьох чисел дорівнює 8. Перше число дорівнює 9, друге 50% першого числа.

Ответы

Автор ответа: ostrovskijandrij639

Відповідь:

10,55

Пояснення:

8*3=24-сума чисел

9-перше число

9:2=4,5-друге ччисло

24-(9+4,5)=24-13,5=10,

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