Ответ по предмету Математика: Один рабочий выполняет заказ за 7 ч. Сколько таких заказов выполнят двое рабочих за 14 ч, работая вместе, если они работают с одинаковой скоростью?

Предмет: Химия, автор: sherniazdilshat12345

Содержание вещества 1,5 моль газа азота (N2) ;
(а) масса;
(b) вычислите объем, который вы получите при нормальных условиях.

7 лет назад

Предмет: Алгебра, автор: valeriasemiletova2

Найдите область определения функции,заданной формулой : у= 3х-5 ____ 7

7 лет назад

Предмет: Английский язык, автор: bsarsekov03

ПОМОГИТЕ ПОЖАЛУЙСТА!!!!
1.Where is your purse? I - it
lost
loose
have been lost
have lost
2.You look upset. What ＿ to you?
has happened
happened
happens
had happened
3.No matter how hard they struggled with it, the window ... open.
wouldn't
wasn't
couldn't
isn't
4.That's the…. car I've ever seen. It uses… petrol than any other car I know.
cheaper/less
cheapest / the least
cheapest / less
cheaper/more

5.She didn't finish … coffee.
to have
having
have
to having
6. … did it take her … all the dishes?
How much / washing
How much / to wash
How long / washing
How long / to wash
How / to wash

7.We've known Paul … two years. Have you … met him?
since / for
for / never
since / ever
for / ever
8. I … all their records since then.
have bought
bought
buy
buyed
9. The lesson begins at seven o'clock. (What time…?)
What time does the lesson begin?
What time is the lesson begin?
What time the lesson begins?
What time do the lesson begin?
10. Choose the correct answer
there is a big brown old plastic chair
there is a plastic chair big old brown
there is a brown big old plastic chair
there is a big old brown piastic chair
11. How are we going to finish this work when we ve got only … time and … people to do it?
A few / a few
A little / few
a few / a little
a little/ a ittle
12. Choose the correct answer
John likes theirs English class very much
John likes her English class very much
John likes ours English class very much
John likes his English class very much
13. Come in and have a seat, We … our plans for the next year.
have discussed
have just been discussing
have just discussed
had discussed
14. Karla … (leave) buy the time we arrived
Had left
Was leaving
Has left
left
15. "Somy I'm late". - That's all right. I … long.
have not waiting
have not been waited
have not waited
have not been waiting
16. Mrs. Stone … as a teacher for twenty years.
works
worked
has been working
has worked
17. I … dinner with my family now
Am having
was having
having
have
18. There was a lot of noise in this building last night. Well, … I was out at a party all night.
it mustn't have been me
it couldn't have been me
shouldn't have been me
it might have been me
19. I hate all this polite chat at parties. Oh, you … polite in my house. Say whatever you want!
needn't be
mustn't be
shouldn’t be oughtn’t to be

7 лет назад

Предмет: Математика, автор: sveta0303

Помогите пожалуйста. Пешеход проходит 4 км в час. А велосипедист проезжает за это время в 3 раза больше. На сколько километров в час больше проезжает велосипедист, чем проходит пешеход?

10 лет назад

Предмет: Математика, автор: Angel20042011

Ученики за 2 дня посадили деревья в школьном дворе. В первый день они посадили 9 деревьев, что составляет седьмую часть всех деревье. Сколько всего деревье посадили ученики за 2 дня?

Ответ правильно ли решена задача?

1) 9х7=63 (2 день)

2)63+9=72(всего)

10 лет назад

Один рабочий выполняет заказ за 7 ч. Сколько таких заказов выполнят двое рабочих за 14 ч, работая вместе, если они работают с одинаковой скоростью?

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