-
Упростите выражение:
a) 5(x+1.4y)-0.8(2x+y)
б) 2/3(x-y-z)-(2/3x-y-z)
в) -a+0.5(3a+0.2b)-(a+0.1b)
г) -10(2/5b+1/2)+3/4(8-b)+5b
/-дробная черта
Ответы 2
-
a) 5(x+1.4y)-0.8(2x+y)=5х+7у-1,6х-0,8у=3,4х+6,2
б) 2/3(x-y-z)-(2/3x-y-z)=2/3х-2/3у-2/3z-2/3x+y+z=1/3y+1/3z=1/3(y+z)
в) -a+0.5(3a+0.2b)-(a+0.1b)=-a+1.5a+0.1b-a-0.1b=-0.5a
г) -10(2/5b+1/2)+3/4(8-b)+5b=4b-5+6-3/4b=3.25b+1
-
Автор:
martha3ja7 - 7 лет назад
-
0
-
-
a) 5(x+1.4y)-0.8(2x+y)=5х+7у-1,6х-0,8у=3,4х+6,2
б) 2/3(x-y-z)-(2/3x-y-z)=2/3х-2/3у-2/3z-2/3x+y+z=1/3y+1/3z=1/3(y+z)
в) -a+0.5(3a+0.2b)-(a+0.1b)=-a+1.5a+0.1b-a-0.1b=-0.5a
г) -10(2/5b+1/2)+3/4(8-b)+5b=4b-5+6-3/4b=3.25b+1
-
Автор:
santanamwyb - 7 лет назад
-
0
-
-
Добавить свой ответ
-
подчеркни равенства в которых пропущены слагаемые... 6+...=7 5+1=..... .....+2=6 8=...+1 6=5+....... 7=5+.... 3+2+.... 3+1=...... 7+.....=9
-
Предмет:
Математика -
Автор:
damon98 - 7 лет назад
-
Ответов:
1 -
Смотреть
-
-
Ex.1 Choose the correct tense (Present Indefinite or Present Continuous)
Look up! The sun ________________________(shine) so brightly! My uncle usually ____________________(read) newspapers in the evening. As a rule, my sister __________________(do) all housework. Her mother ___________________(go) to the South every summer. What _________________the students _________________(do) at the moment? –Don’t disturb them! They________________(write) a test. My parents ________________(arrive) this week. London________________(stand) on the River Thames. How many hours _______________you _____________(work) every day? I _________________(prefer) hot food. This medicine ________________(taste) awful. Many of the world’s natural resources ___________________(now disappear). What ____________you __________(do) next weekend? The climate __________________(get) warmer and warmer.Ex.2. Put the verb in brackets in the Present Perfect or Past Simple tense
Have you heard the rules? They _______________(just/elect) a new manager. Martha _______________(find) a new job. She is starting next week. When ______________Simon _______________(arrive) at the cinema yesterday? John is a well-known artist. He ______________(paint) a lot of pictures. John ________________(paint) his first picture in 1980. Mike _______________(win) more than 20 medals when he was a sportsman. I ________________(see) Sting last year. I ______________(speak) to Celine Dion. I _______________(write) 5 letters this week. I ______________(read) this book a month ago. He _______________(still/not/buy) a computer. They ________________(yet/not/find) the way out. _______________you ______________(write) this translation yet?Ex. 3. Put the verbs in brackets in the Present Simple, Present Continuous, Past Simple or Past Continuous
What ____________you ______________(look) at? –Some photos I __________(take) when I _____________(be) on holidays. I _______________(be) sorry, but I ______________(not understand) what you _____________(mean). What ___________Jane_____________(do)? – She ______________(be) a teacher, but she ______________(not teach) at the moment. He never _____________(smoke) and ___________usually __________(not eat) meat. Last time I _____________(go) abroad was when I ______________(go) toLondon. We _____________(stay) inLondonfor three days. On the first day when I ______________(do) the sights, I _____________(meet) my old friend. He ___________just______________(go) to his hotel when we ___________(come) across. ___________you ____________(often, go) to the gym? – I _______________(not go) much at the moment, I ____________(not have) time. I ____________(be) too busy these days. But I ___________(want) to go to the gym next week. Tomorrow Kate _____________(visit) her aunt, that’s why now she _____________(make) a cake. It _____________(smell) delicious! When Kate ____________(visit) her aunt last week, she _______________(buy) some pastries from the baker’s, but they _____________(not be) that good.Ex.4. Complete the conversation. Use some, any or no.
A: I’m making ___________coffee. Would you like _________?
B: No, thanks. I’m going shopping. What do we need?
A: Well. We haven’t got ___________bread.
B: Have we got _____________cheese?
A: No, we haven’t. And there aren’t __________eggs.
B: Is there ___________tea left?
A: No, there’s ____________tea. And we haven’t got ___________rice.
B: Right. Bread, cheese, eggs, tea and rice.
A: Have you got enough money?
B: I’ve got_______________, but not much. Can you lend me ___________?
Ex.5. Supply one of the compounds with some-, any- and no.
At the party you’ll see ______________you haven’t met yet. I’m not going to see him because I have ______________important to report. I was late. I found____________in the house. I think there’s _____________wrong with my watch. Is there ________________at home? The doorbell rang but there was ____________there. I know ______________at all. _____________can become a member of the club by paying a subscription. When we get there it may be too late to do ______________. ______________has been here before us. “Why don’t you say ___________?” he demanded. This is my affair and ____________else’s. He looked at my pictures and didn’t say __________________.Ex.6. Put the correct form of much, many, (a) little, (a) few.
You’ve made so _____________(много) mistakes in your test again! –Don’t be surprised, I had___________(совсем немного) time to get ready for it. Do you have ____________(много) time on Saturday? I’m afraid we have too _____________(мало) flour to make a cake. –I think we can cook the cake, there is still _____________(немного) flour left. I don’t have ___________(много) friends inItaly, but still there are ___________(много) people I’d like to see. Don’t hurry, take as _____________(много) time as you need.-
Предмет:
Английский язык -
Автор:
mickeyibarra - 7 лет назад
-
Ответов:
1 -
Смотреть
-
-
РЕБЯТ ПОМОГИТЕ!!!!!!!!!!сведение о трех международных конференциях тегеранская, ялтинская и потсдамская
- Решить систему уравнений: {xy=-2, х-2у=5;}
Топ пользователей
-
Fedoseewa27
35934 -
Devilian
2792 -
Pikachu
2228 -
hobbesbowers
2120 -
kaylynnbarron676
1818 -
女fei
1240 -
yulia-kaplina
1158 -
Poinntt
946 -
Bars
930 -
Queenmagic18
770