Предмет: Математика, автор: Ясмина1111111234

Аомогите с 4-можно краткую запись?Решение не надо!!!

Приложения:

Ответы

Автор ответа: xxxeol
0
ДАНО
Vпр = 42,8 км/ч -  скорость против течения
Vт = 2,7 км/ч - скорость течения.
НАЙТИ
Vк = ? - скорость катера
Vпо =? - по течению.
РЕШЕНИЕ
Vпр = Vк -  Vт
Vк = Vпр + Vт = 42,8 + 2,7 = 45,5 км/ч - собственная скорость - ОТВЕТ
Vпо = Vс +Vк = 45,5+ 2,7 = 48,2  км/ч
или
Vпо = Vпр + 2*Vк  = 42,8 + 2,*2,7 = 42,8 + 5,4 = 48,2 км/ч - скорость по течению - ОТВЕТ
Автор ответа: Ясмина1111111234
0
спасибо)
Предыдущий вопрос
Следующий вопрос
Интересные вопросы
Предмет: Математика, автор: nimurafuruta1
В ответе получил, что таких корней нет, помогите пожалуйста, не потерял ли я чего?

Всё свел к уравнениям:
2cos(x) - 1 =0 (+- 4pi/6 + 2pi*k, k принадлежит Z)
sin(x) - 4 = 0 (нет корней)
6 лет назад
Предмет: Английский язык, автор: wusmenn
Необходимо решить вот эти тесты. Кто знает помогите.

1. You wouldn't believe it. It … repaired after the accident.

A. 'll cost him fifteen thousands of dollars to get his car been
B. cost him fifteen thousand dollars to have his car
C. costed to him fifteen thousand dollars to get his car
D. costs him fifteen thousand of dollars to have his car be

2. In conformity with the law the US corporations … of their capital by buying back their own shares.

A. often are permitted reduce the number
B. are sometimes forbidden reduce some
C. also are permitted to reduce the sum
D. are also allowed to reduce the amount

3. The partners have been forced to reconsider the firm’s main objectives … that will … its markets.

A. lately … allow them to alter
B. last year … permit altering
C. just now … permit to control
D. in 2015 … allow them control

4. The family model of a male breadwinner and female homemaker … an ideology.

A. have come as a major challenge like a practice or
B. come under substantial inquiry as a practice as well as
C. has come under suspicion both as a practice as well as
D. came under significant challenge both as a practice and

5. In the last few years a sharp economic decline … in serious problems for ….

A. has resulted … the elderly, young children, and the unemployed
B. was resulted …the poor people, the young, and the homeless people
C. had a result … the old, young children, and the unemployed people
D. resulted … elderly, the young children, and unemployed

6. Hurry up! By the time we … the office, the meeting …

A. will get to … will have already started
B. arrive to … will already start
C. arrive at … will already have started
D. will arrive in … already will start

7. Find out if … the precis tomorrow and if … , ask him to submit it to the dean’s office.

A. he will finish … he will do
B. he finish … he does
C. he finishes … he will
D. he will finish … he does

8. Internet Banking manager is absolutely tired. He … his report about the future of e-banking.

A. was working very hardly making
B. has been working very hard all day long writing
C. had been working too hard when he wrote
D. has been working hardly for all the day because of
6 лет назад
Предмет: Українська мова, автор: fahdkj
6. Букву е треба писати на місці пропусків в обох словах рядка
А пал..чка, усміш..чка
Б кіш..чка, варен..чок
в намист..ЧКО, ДОЩ..чка
Гдіж..чка, хлопч..чок
6 лет назад
Предмет: Алгебра, автор: рус612
первая цифра двузначного числа на 4 больше 20 и произведение равно 21 Найдите это двузначное на двузначное число методом системой уравнения
9 лет назад
Предмет: Математика, автор: alenarast17
Запиши в таблице, какими могут быть длины двух разных сторон прямоугольника, площадь которого 36 см2
9 лет назад