В
Все
Б
Биология
Б
Беларуская мова
У
Українська мова
А
Алгебра
Р
Русский язык
О
ОБЖ
И
История
Ф
Физика
Қ
Қазақ тiлi
О
Окружающий мир
Э
Экономика
Н
Немецкий язык
Х
Химия
П
Право
П
Психология
Д
Другие предметы
Л
Литература
Г
География
Ф
Французский язык
М
Математика
М
Музыка
А
Английский язык
М
МХК
У
Українська література
И
Информатика
О
Обществознание
Г
Геометрия
Koteekanuha
Koteekanuha
08.05.2023 14:18 •  Алгебра

82

капните в стакан немного краски налейте рамешайте воду почему раствор окрасился
отлейте половину содержимого стакана и долейте стакан доверху чистой водой как изменился цвет воды как это обяснить

Показать ответ
Ответ:
vnigmatullina
vnigmatullina
09.02.2023 13:06

2.17. из трехзначных а 5 делятся  100, 105,110; 115..,995

Пусть всего n чисел делится на 5, тогда увидев, что их можно посчитать с формулы n- го члена арифметической прогрессии, получим aₙ=a₁+d*(n-1), где  а₁=100; aₙ=995, d=5,  найдем n. подставим данные в формулу. получим

995=100+5*(n-1); 199=20=n-1⇒n=199+1-20=180

значит, трёхзначных чисел, делящихся на 5, 180.

Аналогично найдем количество трёхзначных чисел, делящихся на 7.

105, 112, 119...,994; а₁=105; aₙ=994, d=7.

994=105+7*(n-1); n-1=142-15; n=128

значит,  трёхзначных чисел, делящихся на 7, 128.

на два делятся четные. Всего 999-99=900 трехзначных, половина из них четные. т.е. четных 450

Тогда общее количество искомых чисел, 450+180+128=758

0,0(0 оценок)
Ответ:
AnnaIzotova53
AnnaIzotova53
26.03.2020 21:08

阿迪爾汗

is my mother. She has baked a delicious strawberry pie.

are my grandparents. They are riding bikes.

is our house. I can see it from here.

are my parents. My Mom’s name is Ann and my father’s name is Tom

is my mother. She has baked a delicious strawberry pie.

are my grandparents. They are riding bikes.

is our house. I can see it from here.

are my parents. My Mom’s name is Ann and my father’s name is Tom

is my mother. She has baked a delicious strawberry pie.

are my grandparents. They are riding bikes.

is our house. I can see it from here.

are my parents. My Mom’s name is Ann and my father’s name is Tom

is my mother. She has baked a delicious strawberry pie.

are my grandparents. They are riding bikes.

is our house. I can see it from here.

are my parents. My Mom’s name is Ann and my father’s name is Tom

is my mother. She has baked a delicious strawberry pie.

are my grandparents. They are riding bikes.

is our house. I can see it from here.

are my parents. My Mom’s name is Ann and my father’s name is Tom

is my mother. She has baked a delicious strawberry pie.

are my grandparents. They are riding bikes.

is our house. I can see it from here.

are my parents. My Mom’s name is Ann and my father’s name is Tom

is my mother. She has baked a delicious strawberry pie.

are my grandparents. They are riding bikes.

is our house. I can see it from here.

are my parents. My Mom’s name is Ann and my father’s name is Tom

is my mother. She has baked a delicious strawberry pie.

are my grandparents. They are riding bikes.

is our house. I can see it from here.

are my parents. My Mom’s name is Ann and my father’s name is Tom

is my mother. She has baked a delicious strawberry pie.

are my grandparents. They are riding bikes.

is our house. I can see it from here.

are my parents. My Mom’s name is Ann and my father’s name is Tom

is my mother. She has baked a delicious strawberry pie.

are my grandparents. They are riding bikes.

is our house. I can see it from here.

are my parents. My Mom’s name is Ann and my father’s name is Tom

is my mother. She has baked a delicious strawberry pie.

are my grandparents. They are riding bikes.

is our house. I can see it from here.

are my parents. My Mom’s name is Ann and my father’s name is Tom

is my mother. She has baked a delicious strawberry pie.

are my grandparents. They are riding bikes.

is our house. I can see it from here.

are my parents. My Mom’s name is Ann and my father’s name is Tom

is my mother. She has baked a delicious strawberry pie.

are my grandparents. They are riding bikes.

is our house. I can see it from here.

are my parents. My Mom’s name is Ann and my father’s name is Tom

is my mother. She has baked a delicious strawberry pie.

are my grandparents. They are riding bikes.

is our house. I can see it from here.

are my parents. My Mom’s name is Ann and my father’s name is Tom

is my mother. She has baked a delicious strawberry pie.

are my grandparents. They are riding bikes.

is our house. I can see it from here.

are my parents. My Mom’s name is Ann and my father’s name is Tom

is my mother. She has baked a delicious strawberry pie.

are my grandparents. They are riding bikes.

is our house. I can see it from here.

are my parents. My Mom’s name is Ann and my father’s name is Tom

is my mother. She has baked a delicious strawberry pie.

are my grandparents. They are riding bikes.

is our house. I can see it from here.

are my parents. My Mom’s name is Ann and my father’s name is Tom

0,0(0 оценок)
Популярные вопросы: Алгебра
Полный доступ
Позволит учиться лучше и быстрее. Неограниченный доступ к базе и ответам от экспертов и ai-bota Оформи подписку
logo
Начни делиться знаниями
Вход Регистрация
Что ты хочешь узнать?
Спроси ai-бота