Предмет: Математика, автор: Abobysus

Знайдіть невідомий член пропорції 3 : 14 = x : 42
А1 Б12 В9 Г186

Ответы

Автор ответа: lilyatomach
2

Ответ:

В 9

Пошаговое объяснение:

Найти неизвестный член пропорции

3 : 14 = х : 42.

А 1;   Б 12; В 9; Г 186

Равенство двух отношений называется пропорцией.

В верной пропорции произведение крайних членов равно произведению средних членов пропорции ( основное свойство пропорции)

Воспользуемся основным свойством пропорции

3 : 14 = х : 42;

14· х= 3 · 42;

14· х = 126;

х= 126 : 14;

х= 9.

Тогда выберем ответ:  В 9

#SPJ1

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