Предмет: Алгебра, автор: vikysia5058

Помогите сделать хотя бы одну задачу)) лучше все пожалуйста, не обязательно все 3!! Можно и 1, но если есть возможность то 2-3 пожалуйста)

Приложения:

parus77: во 2 задаче не указано,сколько процентов влаги испаряется.
arinakasper248: так я 2 не решила из-за этого

Ответы

Автор ответа: arinakasper248
1

Ответ:

1.

80:100=0,8

0,8•20=16

3.

18:20=0,9

0,9•100=90

Автор ответа: parus77
1

Ответ:

Объяснение:1)

80 чел-100%

20 чел-х %

80:20=100:х

80х=20*100

х=2000:80=25%    отправились на рыбалку

2) не хватает данных для решения

3)  18 дет- 20%

    х дет-100%

18:х=20:100

20х=18*100

х=1800:20=90 деталей план рабочего

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