Предмет: Математика, автор: tipok1234

найдите корень уравнения (4.9+3.5x)(7x-2.8)=0

Ответы

Автор ответа: Lowcase
15

(4,9+3,5x)(7x-2,8)=0,

1)4,9+3,5x=0, 3,5x=-4,9,x=-1,4  2) 7x-2,8=0, x=0,4

Ответ:-1,4  0,4

вроде так

Предыдущий вопрос
Следующий вопрос
Интересные вопросы
Предмет: Английский язык, автор: АқниетЕрболатовна
Our Friends<br />Dogs make the best pets. They are faithful, and friendly.They are intelligent. They love people.They live for us and can die for us.They understand us without words. They are happy to be with us and are always ready to forget our mistakes.<br />Domestic dogs appeared about 15,000 years ago.They were popular in Ancient Rome, Greece and Egypt. Since old times people have experimented with dogs to develop some specific characteristics.As a result we have got a lot of different kinds of dogs or a lot of breeds.Modern dog breeds show more differences in size, looks and behavior that any other domestic animal.<br />Dogs play many roles in human society and people often use them as working dogs.People use dogs to hunt, to guard.Greyhounds, setters, retrievers are excellent hunters and are very popular in the USA where hunting is a sport.Such breeds as collies, Welsh corgis are wonderful shepherds and help to guard cows and sheep.A well-known breed of St.Bernard is good at finding people in the mountains under snow.Newfoundland that is a wonderful swimmer is good at rescuing people at sea.The USA police use dogs a lot.They train them to find drugs and bombs.Dogs patrol streets together with policemen.<br />In many countries, the most common and perhaps most important role of dogs is as companions.Dogs help people in many ways but we love them for their loyalty.Their loyalty makes them our best friends.
Questions
1) What roles do dogs play in our society?
2)Why are there so many breeds?
3) What breeds do you know?
4)What breeds does the author mention on the text? 5)Why do dogs make the best pets?
2 года назад
Предмет: Русский язык, автор: Nora777
сочинить текст со словами: исконный, осенить, палисадник, диссонанс, реликвия, аппетит, линолеум, мошенник, вереница, каморка.
пожалуйста помогите! не игнорируйте.
2 года назад
Предмет: Английский язык, автор: elya2017
Помогите пожалуйста ☺️
2 года назад
Предмет: Алгебра, автор: hhhhhhh0
хотя бы несколько,плииииииз)))
8 лет назад
Предмет: Английский язык, автор: Slobin
Составить 3 предложения по типу: I am allowed to .... , because .....
8 лет назад