Предмет: Математика, автор: aminabakitzhankizi

помогите пожалуйста с номером 1028 и 1029 пожалуйста срочно нужно

Приложения:

Ответы

Автор ответа: rudemak

6

Ответ:

Пошаговое объяснение:

1028)

$\left \{ {{2x-12>0} \atop {3x-9\leq 0}} \right. \\\\\\\left \{ {{2x>12} \atop {3x\leq 9}} \right. \\\\\left \{ {{x>6} \atop {x\leq 3}} \right. \\\\$

x ∈ (-∞;3]∪(6;+∞)

2)

$\left \{ {{5x-25<0} \atop {4x+16>0}} \right. \\\\\left \{ {{5x<25} \atop {4x>-16}} \right. \\\\\left \{ {{x<5} \atop {x>-4}} \right.$

x∈(-4;5)

3)

$\left \{ {{1.1x+1.1\leq 0} \atop {8x-16<0}} \right. \\\\\left \{ {{{1.1x\leq -1.1} \atop {8x<16}} \right. \\\\\left \{ {{x\leq -1} \atop {x<2}} \right.$

x∈(-∞;-1]

1029

1)

$\left \{ {{7x-21\leq 0} \atop {1-x>0}} \right.\\\\\left \{ {{7x\leq 21} \atop {-x>-1}} \right.\\\\\left \{ {{x\leq 3} \atop {x<1}} \right.$

x∈(∞;1)

2)

$\left \{ {{25-5x\geq 0} \atop {3x-18<0}} \right. \\\\\left \{ {{-5x\geq -25} \atop {3x<18}} \right.\\\\\left \{ {{x<5} \atop {x<6}} \right.$

x∈(∞;5)

3)

$\left \{ {{1.2-0.6x>0} \atop {9x+27\leq 0}} \right. \\\\\left \{ {{-0.6x>-1.2} \atop {9x\leq -27}} \right.\\\\\left \{ {{x<2} \atop {x\leq -3}} \right. \\$

x∈(∞;-3]

Предыдущий вопрос

Следующий вопрос

Интересные вопросы

Предмет: Математика, автор: ssergytin

0.3 в степени х умножить на 3 в степени х равно корень кубический 0.81 найти степень

2 года назад

Предмет: Английский язык, автор: milena012

ПОМОГИТЕ ПЛИИИЗ! Read the text. Write the missing words in the correct places in the puzzle. What's the mystery word?

My friend Jane and l have got lots of the cinema ay the weekends. Both of like .......... To music too, and we like ......... At parties if the music's really good! Jane's better at music than me - she's at home.
We like different sports - Jane often goes .......... In the park in the morning but l prefer .......... In pool or in the river. I like ...... pictures at school in the Art lessons, but Jane's favorite subject is English because she loves ...... Books. There's one thing we both hate - playing ........ games!

2 года назад

Предмет: Английский язык, автор: milena012

ПОМОГИТЕ ПЛИИИЗ! Read the text. Write the missing words in the correct places in the puzzle. What's the mystery word?

My friend Jane and l have got lots of the cinema ay the weekends. Both of like .......... To music too, and we like ......... At parties if the music's really good! Jane's better at music than me - she's at home.
We like different sports - Jane often goes .......... In the park in the morning but l prefer .......... In pool or in the river. I like ...... pictures at school in the Art lessons, but Jane's favorite subject is English because she loves ...... Books. There's one thing we both hate - playing ........ games!

2 года назад

Предмет: География, автор: алин24

выбрать правильный буквы к ответу география

8 лет назад

Предмет: Русский язык, автор: ibra19971998

Грамматические основы
Один прыжок, и лев на спине у буйвола
Найдите грамматические основы и объясните, почему перед И стоит запятая

8 лет назад