Вычислите: [tex](0,3-\frac{3}{20})*2\frac{6}{7}+\frac{4}{5}:1,4[/tex]
Если можно то по-подробней пожалуйста
Заранее спасибо! 

Какое количество вещества содержится в алюминиевой отливки массой 5,4 кг?

Как относится "двенадцать" к религии? 

вставте в текст глаголы из скобок в правельной форме один из двух ( на правило способы выражения будущего времени)

1)Today's schedule is very busy.

 Really? But Ihope we _________ (are going to/will) have time to go to the dancing party. I can't do without dance music.

2) I adore jazz and my favourite big band is doing well this month: their new jazz compositions have been very popular and the pubic admires them. They _________ (are entering/ are going to enter) the top jazz chart at the end of the month.

3)I am looking forward to the country music festival. i don't known the programme but I think that this year it ______ (will include/going to include) folk and country music.

4) Rook music is really my favourite and I spent thee hours queuing up for the concert tickets. But I got them! So next Sunday I ____________ (am going/ will go) to a rock concert.

5) I like musicals. I hope the first night of Chours Line _________ (will take place/ is taking place) soon.

6) We are waiting for a great concert: a famous orchestra ___________ ( comes/ is coming) to our city on Friday.

7) I like jazz programmes on TV. But I don't like one thing about them. They are night programmes. And this evening it ____________ ( is going to begin/begins) at about midnight.