Предмет: Математика, автор: Аноним

1 )Составьте пропорцию:
8:14; 27:18; 36:54

2)Найдите неизвестный член пропорции(85-87)
¤ x :18=7:9;
¤ 6:x=3:7
¤ 12:7=60:x

Заранее спасибо большое

Ответы

Автор ответа: Яна38516
0
1)в числителе 8, в знаменателе 14
в числ.27 в знам 18
в числ 36 в знам 54
2)х/18=7/9
Х=18*7/9
х=14


6/х=3/7
х=7*6/3
х=14


12/7=60/х
х=7*60/12
х=35
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Вот текст:

Sleep
During the week I usually wake up at 6.30 a.m. I sometimes lie in bed for five
minutes but then I have to get up get out of bed and get dressed). Most evenings, I go to bed at about 11.30 p.m. I'm usually very tired, so I go to sleep / fall asleep very quickly. Occasionally though, I can't get to sleep (=succeed in sleeping). When that happens, I sometimes manage to fall asleep about 3 a.m., then I oversleep (=sleep too long) in the morning. If I have a late night (=go to bed very late; not an early night), I try to have a nap (=a short sleep, e.g. 20-25 minutes) in the afternoon. The weekends are different. On
Saturday and Sunday I have a lie-in. (=stay in bed until later, e.g. 8 a.m. or 8.30 a.m.)
Food
In the week I have breakfast at 7.30 a.m., lunch at 1.00 p.m., and dinner around 7
p.m. I also have one or two snacks (=small amounts of food), e.g. cakes, biscuits or fruit, during the day at work. As I live alone / on my own / by myself (=without other people), I also have to make my own breakfast and dinner (=prepare breakfast and dinner for myself), but during the week I don't bother (=make an effort) to cook very much. I also
have to feed (=give food to) my two cats twice a day as well.
Note: With breakfast, lunch or dinner in general, there is no definite article (the).
Keeping clean
In the summer I have a shower in the morning, but in the winter I often have a bath
instead (=in place of a shower). Sometimes I have a shave at the same time, or I shave when I have a wash and clean/brush my teeth after breakfast. I wash my hair two or
three times a week.
Note: In some contexts, it is more common in English to use have + noun than a
single verb, e.g. I'm going to have a wash. [NOT I'm going to wash.] Work
In the morning I leave home about 8.15 a.m. and get to work (=arrive at work) by 9
a.m. I have a lunch break (=stop work for lunch) from 1-2 p.m., and a couple of short
breaks during the day. I leave work around 5.30 p.m. and get home about 6.15 p.m.
Evenings
During the week I usually stay in (=stay at home) and have a rest (=relax and do
nothing). But at the weekend I often go out (=leave the house for social reasons, e.g. go to the cinema or disco with friends), but quite often I also have friends for dinner (=invite friends to my house and cook dinner for them), or friends just come round (=visit me at
the house) for a chat (=conversation) or we play cards, e.g. poker or bridge.
Housework
I do the shopping (=buy the food) on Saturday. Fortunately (=luckily) I have a
cleaner (=a person who cleans) and she does most of the housework: she does my washing (=washes the clothes), the washing-up (=washes the dishes) and does most of
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