Предмет: Математика, автор: hakermen8

пж срочно дам 10баллов пж​

Приложения:

Ответы

Автор ответа: ildar502020
1

Ответ:

Пошаговое объяснение:

1.  40% от х равно 80;  1%=>1/100=0.01; 40%=>40/100=0.4;

0.4x=80;

x=80:0.4;

x=200.

***

2.  20% от х равно 14 страниц.  20%=>20/100=0.2;

0.2x=14;

x=14:0.2;

x=70 страниц в книге.

***

3.  В  молоке 4% жира.

в 850 кг молока  ---   х% жира.

Найдем 4% от 850 кг.

850*0,04=34 кг жира.

***

Найдем отношение 20 км к 80 км:

20/80 = 2/8=1/4=0,25;

1%  ------- 0.01;

x% ------ 0.25;

x=0.25:0.01=25% пути прошел турист.

***

5. 55%-25%=30%;

На 30% площадь занятая яблонями больше площади занятой вишнями.

Найдем 30% от 2,2 га:

2,2*0,3 = 0,66 га.

На 0,66 га площадь занятая  вишнями меньше  площади занятой яблонями.

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