в первый день туристы проехали 340 км. а во второй 460 км весь путь они проехали со скоростью 85км/ч\. сколько часов они были в пути?

что делают ребята в библиотеке?

пожалуйста, помогите! раскройте скобки, употребив слова в нужном времени. Chocolate (1)_________ (to make) from the seeds of the tropical cacao tree. It`s sweet tasty and generally delicious--the average Briton (2)_______ (to eat) almost 10 kg of the stuff every year. The first British chocolate factory (3)__________ (to set up) in London in 1657.The English firm Cadbury (4)__________ (to make) chocolate since 1831. Facts say that we (5)________ (to enloy)it for centuries and serious studies (6)______ (to do ) to find the reasons of our chocolate passion. Chocolate can(7)________ (to have) a piace in a balanced diet but it doesn`t contain many of the nutrients needed for a healthy lifestyle. So what is it that makes us(8) ___________ (to love)sweets and chocolate andhow much should we eat? Chocolate (9) _________ (to contain) fat so it (10)_____ ( to recommend). It has tje carbohydrates that you need to replace lost energy but rather than (11)____ (to eat)sweets and chocolate you should (12)______ (to eat) bread and cereals. Chocolate (13)____ (to recommend) as a treat --perhaps once or twice a week. It`s high in fat and sugar so you shouldn`t (14)________ (to have)it every day.

Решите уравнение

x^4-10x^3+9=0