Скорость пассажирского поезда-а км/ч, а товарного-b км/ч.Что записано на математическом языке: а)а+b; б)1750:а в) 1750:b г) 1750:(а+b) Помогите пожалуйста!Помогите Пожалуйст

а!

cоставьте формулу натурального числа, которое оканчивается числом, делящимся на 15. Если можно поясните.

помогите плииииз на завтра...

       Listen and repeat the wirds in the blue column

   My son starts school thes year. It is a big event in his life.

 - This event took place on the fifteenth of September. We have interesting events during a school year.

   - We study biology at school. Biology is a science abaut humans,nature and animals.

- We tare part in after school activeties and prepare for school events.

We'll have music and sport event and school too.

- We repeat the new words in chorus. Children like to say "Hooray!"in chorus.

- A festivite is a celebration of hoolidays or events in  a happy way.

- A ceremony is a formal event. On the Day of Knowledge we have an Opening  Ceremony... решите плиииз эту фигню