In the evenings into the city and go clubbing or see a movie. a lot of new friends. my pronunciation is much better already, and almost everything. On weekdays Liam. At the moment on their new website and help with it. some useful stuff about how people business in this country.
to see me? the winter holiday skiing with Ryan and Liam. to meet you and there’s plenty of space. You must bring lots of warm clothes because really cold here in the winter. Let me know as soon as . And tell me what these days.
1. Пусть х - скорость автобуса, тогда х+40 - скорость автомобиля. Автомобиль ехал 45 минут = 3/4 часа, автобус ехал 30+45=75 минут=5/4 часа.
1 случай:(х+40)*3/4-6=5/4*х
3/4*х+30-6=5/4*х
1/2*х=24
х=48
48*5/4=60
ответ:60 (км) от пункта А
2 случай: (х+40)*3/4+6=5/4*х
3/4*х+30+6=5/4*х
1/2*х=36
х=72
72*5/4=90
ответ:90 (км) от пункта А
2. Пусть х - скорость по грунтовой дороге, тогда (х+4) - скорость по шоссе. По грунтовой дороге ехал 30 минут= 1/2 часа, по шоссе 40 минут=2/3 часа.
х*1/2+(х+4)*2/3=12
х*1/2+х*2/3+8/3=12
7/6*х=12-8/3
7/6*х=28/3
х=28/3*6/7
х=8
8+4=12
ответ: 12км/ч скорость велосипедиста на шоссе
y-x_x(x-a) - y+a_a(a-x)
Объяснение:
Я не знаю