Предмет: Математика, автор: innakosheleva

от села до города легковой автомобиль доехал за 3 часа ,а грузовой за 5 часов ,найдите скорость каждого автомобиля ,если скорость грузового автомобиля на 32 км в час меньше скорости легкового автомобиля

Annesmesh: По принципу " Пусть скорость легкового авто рана Х км/ч..." и так далее

Annesmesh: Какой класс?

Ответы

Автор ответа: Annesmesh

х -скорость легкового
(х-32) - скорость грузовика

(х-32)*5=3х
5х-160=3х
5х-3х=160
2х=160
х=80 (км/ч) - скорость легкового
х-32=80-32=48 (км/ч) -скорость грузового

innakosheleva: ой спасибочки

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Английский язык, автор: zhenyaklimova1

Даю 15 баллов
1 If Jack (went\ had gone) to university when he was 18, he (would be\ would have been) a doctor now. 2. If he (weren`t\ hadn`t been) encouraged by his teacher to do English when he was at school, he (wouldn`t be\ wouldn`t have been) a successful translator now. 3. Alice (would know\ would have known) more about USA now if she (read\had read) more about this country during the year. 4 Boris (would be\ would have been) healthy now, if he (followed\ had followed) the doctor`s advice. 5. Jane (would be\ would have been) a winner of the race now if she (trained\had trained) during the year.

1 год назад

Предмет: Русский язык, автор: Аноним

помогите придумать сочинение рассуждение на тему хачу и надо срочно народ помогите пожалуста

1 год назад

Предмет: Английский язык, автор: zhenyaklimova1

Даю 20 баллов
Choose the right verb form to complete the sentences. Pay attention to the tenses the parts of the sentences refer to. 1 If Peter (went\ had gone) to university when he was 18, he (would be\ would have been) a good specialist now. 2. If he (weren`t\ hadn`t been) encouraged by his parents to study English when he was at school, he (wouldn`t be\ wouldn`t have been) a successful translator now. 3. We (would know\ would have known) more about English speaking countries now if we (read\had read) more information about them during the year. 4 Grandmother (wouldn`t be\ wouldn`t have been) sick now, if she (began\ had begun) to take the pills before. 5. They (would be\ would have been) winners of the game now if they (trained\had trained) during the year. 5. Make sentences complete using a comparative form. 1 He answered quite (easily) than we expected. 2 She swam (quickly) of all the children. 3 He was seriously ill (seriously) than we thought at first. 4 Today the sun shines (brightly) of all the days of May. 5 When I wear glasses I can see (clearly).

1 год назад

Предмет: Химия, автор: Coolgirlflame1

рассчитайте массовую долю сахара в стакане чая (250мл.), в который положили две чайные ложки сахара (по 8 г. каждой)

7 лет назад

Предмет: Русский язык, автор: mansirovaelmira2008

нужно подобрать 6глаголов и проспрягать их
1спр. 3гл.
2спр. 3гл.
Пж хелп

7 лет назад