Предмет: Математика, автор: yakovlievaelis

допоможіть будь ласка !​
дам 70 балів!

Приложения:
tatsach: 70 баллов обман

Ответы

Автор ответа: вита976
1

Ответ:

71,6

Пошаговое объяснение:

Спочатку знайдемо скільки км він проїхав:
74.1*3+67,8*2=357,9 км

Далі, знайдемо середню швидкість:
відстань/час
357,9/5=71,58 км/год

Ну і округлюємо до десятих
71,58 = 71,6 км/год

yakovlievaelis: ура! наконец то! нормальный ответ!
yakovlievaelis: спасибо!)
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