ДАНО Движутся одновременно и в одном направлении. d1 = 67 км V2 = V1 - 4 км/ч d2 = 91 км НАЙТИ t = ? при дистанции d2 между ними Вариант 1. Путь первого за время t 1) S1 = V1*t Путь второго за то же время t 2) S2 = (V1-4)*t = S1 - 4*t Расстояние между ними через время t 3) d2 = d1+ S1 - S2 = 67 + 4*t = 91 км - по условию. Упрощаем 3а) 4*t = 91 - 67 = 24 км. - увеличение дистанции. Время движения. 4) t = 24 : 4 = 6 час - ОТВЕТ Вариант 2. Пусть скорость первого - V1=0. Расстояние увеличивается - второй едет в противоположную сторону. РЕШЕНИЕ 1) 91 - 67 = 24 км - должно увеличиться расстояние. 2) 24 км : 4 км/час = 6 час. - ОТВЕТ Схемы расчета прилагается.
My best friend's name is Pete he is a very good friend we have known each other for many years he has short blonde hair and light blue eyes he has a nice and kind smile his face is covered with freckles he is a very busy person because he studies very hard at school sometimes he helps me with some subjects if I don't understand them he wakes up early and streches then, he goes to school after school, sometimes we do homework together and then, he goes to his karate club he really likes karate and I think it is a useful skill karate is also good for the body and overall health sometimes it can also be a self defence method we love the same books and movies he likes star wars, and so do I he likes books about adventures like me sometimes we recommend each other books he is a good person, he never says anything rude about anyone Pete is also very kind to older people, kids and animals! I love spending time with Pete!
-29/3 * (-3/4) = - 29/4 : х
29/4 *х = -29/4
х = -29/4 : 29/4
х = -1