Предмет: Алгебра, автор: alena0505

решите все карточки,пожалуйста
заранее спасибо

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Ответы

Автор ответа: avkirillova89
0
 sqrt{2}/ sqrt{32}= sqrt{2}/ sqrt{16*2}= sqrt{2}/ 4sqrt{2}=1/4
 sqrt{45}/ sqrt{5}= sqrt{9*5}/ sqrt{5}=3 sqrt{5}/ sqrt{5}=3
 sqrt{999} / sqrt{111}=  sqrt{9*111} / sqrt{111}=  3sqrt{111} / sqrt{111}=3
 sqrt{108}/ sqrt{12} = sqrt{9*4*3}/ sqrt{4*3}=3*2sqrt{3}/ 2sqrt{3}=6sqrt{3}/ 2sqrt{3}=3
 sqrt{41^2-40^2}= sqrt{(41-40)(41+40)}=sqrt{1*81}=9
 sqrt{(13^2-12^2)}=  sqrt{(13-12)(13+12)}=sqrt{1*25}=5
 sqrt{2- sqrt{3} }*sqrt{2+ sqrt{3} } =sqrt{(2- sqrt{3})* (2+ sqrt{3}) }=sqrt{4-3}=sqrt{1}=1
 sqrt{4+ sqrt{15} } * sqrt{4- sqrt{15} }=sqrt{(4+ sqrt{15}) (4- sqrt{15})}=sqrt{(16-15)}=sqrt{(1)}=1
Автор ответа: alena0505
0
я в низ разбираюсь,но не совсем,просто когда была эта тема в школе,я болела
Автор ответа: avkirillova89
0
у вас там даже примеры показаны как решать если бы вы разбирались то давно бы уже решили, я вам первую решила остальные сами попробуйте
Автор ответа: alena0505
0
по интернету у меня не получается,но я уже предупредила учителя,что приду на дополнительные занятия к ней по поводу этих примеров
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Sem. 1 Reading Test
1 Read the text
I’ve got a penfriend Tim. He lives in Cambridge. He is eleven years old
and he goes to school for boys. His family is big. His father is tall and thin. He
has got short straight hair and he wears glasses. Tim’s father is a doctor. He
is clever, helpful and hard-working. He likes sport and plays football and tennis. Tim’s mother is a very beautiful woman. She has got long curly hair and big blue eyes. She is romantic and likes flowers and animals. Tim has got two younger sisters — twins. They are lovely girls with long straight hair. They usually wear their hair in braids. They are only five and they don’t go to school.
Tim’s grandmother is very kind. She likes cooking very much.

2 Read the text and answer.
1) Who is kind? —
2) Who is clever and helpful? —
3) Who is romantic? —
4) Who wears glasses? —
5) Who likes animals? —
6) Who goes to school? —
7) Who doesn’t go to school? —
8) Who likes cooking? —

3 Circle the correct answer.
1) At lessons of … pupils learn about continents, countries, mountains and rivers.
a) History b) Geography c) Science
2) At … lessons pupils learn new words and dialogues, read, write and play
games.
a) English b) Maths c) Art
3) At lessons of … pupils learn about plants and animals and do some experiments.
a) IT b) Science c) Biology
4) At … lessons pupils run, jump, play football and other games.
a) Music b) IT c) PE

4 Make up a dialogue.

— I like skiing and tennis.
— What kinds of sport are you fond of, Sam?
1 — Do you like sports, Sam?
— Yes, I am. I visit the Tennis Club three times
a week. And how often do you do judo?