Предмет: Математика, автор: dfcz

Строительная смесь состоит из цемента, песка и воды.2/9 части цемента, 2/3 части песка,остальное вода. Сколько кг. песка надо взять ,чтобы приготовить смесь содержащую 50 кг. цемента.

Ответы

Автор ответа: MAD

2/3 умножаем на 3/3,для того чтобы уравнять знаменатели-2/3·3/3=6/9(песка); 50÷2=25(кг)-1/9 часть,тогда 25·6=150(кг)-6/9 или 2/3 Ответ:песка надо 150 кг

Предыдущий вопрос

Следующий вопрос

Интересные вопросы

Предмет: Алгебра, автор: Be4ch

Срочно помогите, С.О.Р по алгебре! решите по фото

7 лет назад

Предмет: Английский язык, автор: elenaastahova73

Read the letter and put the paragraphs in correct order.

Dear Sabina,
I hope you are doing great. Thank you for your previous letter, it’s always great to hear from you.
I was wondering if you would like to visit me this summer. We could visit the art and science museums or spend days at the park or wander around the shopping center and buy loads of stuff! My friends would love to spend more time with you, too, so we could hang out with them in that cafe you like or go on a day trip to the beach to chill out. What do you think?
I wanted to let you know that you can stay in our apartment with me and my parents. My younger sister is waiting for you and sending you tones of kisses and hugs. You can share a room with her if you wish.
Can you write back and let me know what you think ASAP? If you decide to come, we can start planning what we will do while you’re here. I’m looking forward to hearing from you and hopefully I’ll see you soon!
Take care, Sultan
1) Take care, Sultan
2) Can you write back and let me know what you think ASAP? If you decide to come, we can start planning what we will do while you’re here. I’m looking forward to hearing from you and hopefully I’ll see you soon!
3) I wanted to let you know that you can stay in our apartment with me and my parents. My younger sister is waiting for you and sending you tones of kisses and hugs. You can share a room with her if you wish.
4) I hope you are doing great. Thank you for your previous letter, it’s always great to hear from you.
5) I was wondering if you would like to visit me this summer. We could visit the art and science museums or spend days at the park or wander around the shopping center and buy loads of stuff! My friends would love to spend more time with you, too, so we could hang out with them in that cafe you like or go on a day trip to the beach to chill out. What do you think?
6) Dear Sabina,

7 лет назад

Предмет: Қазақ тiлi, автор: azamat2008dj

составьте предложение со словом үштілдік

7 лет назад

Предмет: Математика, автор: kitanovzik

Из Кейптауна до Дурбана путешественники могут отправиться морем на яхте,машиной по берегу или на вертолете,а от Дурбана до мыса Сент-Марин-самолетом или на яхте.Сколько есть вариантов маршрутов от Кейптауна до мыса Сент-Марин?

10 лет назад

Предмет: Математика, автор: skiper

cколько осей симетрии имеет прямоугольник и квадрат?

10 лет назад