Предмет: Математика, автор: gabishevi23051923

из пункта А в пункт В, расстояние между которыми 14 км, вышел пешеход. Через 1,5 ч из пункта В в пункт А выехал велосипедист со скоростью на 8 км/ч больше, чем скорость пешехода. Найдите скорость пешехода и велосипедиста. Если велосипедист встретил пешехода через 0,5 ч после своего выезда

Ответы

Автор ответа: Букса

Ответ:

Пошаговое объяснение:

х км/ч - скорость пешехода

х+8 км/ч - скорость велосипедиста

1,5 + 0,5 = 2 (ч) - столько времени был в пути пешеход до встречи с велосипедистом

2*х + (х+8)*0,5 = 14

2х + 0,5х + 4 = 14

2,5х = 14-4

2,5х = 10

х = 10 : 2,5

х = 4 (км/ч) - скорость пешехода

4+8 = 12 (км/ч) - скорость велосипедиста

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Математика, автор: Аноним

Постройте четырёхугольник MNEK ,если M(0;8),N(4;5),E(5;-2),K(-6;0)
Найдите координаты точки пересечения его диагоналей

5 лет назад

Предмет: Английский язык, автор: pchelovod451973

Choose the correct answer to complete the sentences.

1. Would you like .... to eat?
a) nothing b) something c) anything

2. It was really dark and I couldn`t see ... .
a) something b) anything c) nothing

3. Does .... live in that house?
a) anybody b) somebody c) nobody

4. It doesn`t matter where we go. We can go ... we want to.
a) nowhere b) somewhere c) anywhere

5. The guidebook says there's a good hotel .... near here.
a) somewhere b) everywhere c) anywhere

6. This is boring. There's .... . to do.
a) not something b) nothing c) anything

5 лет назад

Предмет: Английский язык, автор: dfrre

ДАЮ 50 БАЛЛОВ ЗА АНГЛИЙСКИЙ
Insert to be or to have in the appropriate form:
1. His father is a well-known lawyer.
2. How old ... you?
3. We ... students of Moscow State Law University.
4. ... you got any textbooks on criminal law?
5. We do not ... special courts for trying juveniles.
6. Under the law every citizen ... the right to elect and be elected.
7. An accused person ... the right to be defended by barristers.
8. I ... very busy today. I ... a lot of work to do.
9. ... you a lawyer? No, I ... a student of law faculty.
10. Police ... a wide range of activity. First of all they ... to see to it that all citizens observe laws.
11. The witnesses ... being examined at the moment.
12. The most common sentences in Britain ... fines, prison and probation.
13. In the UK offenders between 10 and 17 ... tried by special juvenile courts.
14. Jurors ... to listen to witnesses for the defence and prosecution before deciding whether the accused ... guilty or innocent.
15. Magistrates ... not legally qualified, i.e. they ... laypersons.
16. Your solicitor will ... to hire a barrister to argue your case before the court.
17. Mr. Taylor ... no proof that she ... guilty of the theft of confidential documents.
18. The judge ... just finished summing up the case.
19. After the jury ... heard the evidence they retired to deliberate on the verdict.
20. When all the evidence ... in, the jury retires to the jury-room to consider the verdict.
21. In Great Britain a child does not ... full legal status until the age of 18.
22. A child who ... less than 10 years old ... not considered capable of committing a crime.

5 лет назад

Предмет: Математика, автор: моанаед

найдите наибольшее и наименьшее шестизначные числа которые делятся на 5

8 лет назад

Предмет: История, автор: poddubnaya83

Позднее других в Англии произошло событие

8 лет назад