Предмет: Математика, автор: r6748667

Допоможіть пж пж пж будь ласочка (6)

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Ответы

Автор ответа: ultradwalin

Ответ: 1. А) 4,2; 2. Б) 99 %; 3. В) 8; 4. В) 0,61; 5. В) 28; 6. Б) 30 коп.

Пошаговое объяснение:

1. 140 - 100 %

х - 3 %

х=140*3/100=4,2.

2. 0,99 = 99/100 = 99 %.

3. 40 - 100 %

х - 20 %

х=40*20/100=8.

4. 61 % = 61/100 = 0,61.

5. 50 % - 14

50 % - х

х=50*14/50=14.

14+14=28 учнів.

6. 100 % - 100

30 % - х

х=30*100/100=30 копійок.

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