Предмет: Математика, автор: Аноним

пж срочно прямо сейчас дам 100 баллов​

Приложения:

Ответы

Автор ответа: kepker
1

Ответ:

К - центр кола

КЕ - радіус

АВ - діаметр

СР - хорда

Задача:

x - вся тканина

0,3x+0.27x+215=x

0.43x=215

x=500

У перший день було використано 0,3*500=150 м тканини

У другий день було використано 0,27*500=135 м тканини


kepker: хорошо, можно на украинском?)
kepker: сейчас, да
kepker: все
Автор ответа: KnowHowAlgebra
2

Пошаговое объяснение:

задание 3

название. обозначение

центр окружности. К

радиус окружности. КЕ

диаметр окружности. АВ

хорда. СР

задание 4

1) 30%+27%=57%- использовал в 1 и 2 день.

2)100%-57%=43%- 215 метров.

Пусть х(м)- вся ткань. х(м)-100%

215(м)-43%

43х=215*100

43х=21500

х=21500:43

х=500(м)- вся ткань.

500(м)-100%

х(м)-30%

100х=500*30

100х=15000

х=15000:100

х=150(м)-истратил в 1 день.

500(м)-100%

х(м)-27%

100х=500*27

100х=13500

х=13500:100

х=135(м)-истратил во 2 день.

3)135+150=280(м)-истратил в первые 2 дня.

ВСЁ

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