What about you? answer the questions.then tell the class.1 a: were you at school yesterday? b: a: was your mother at home on saturday? b: a: were you with your friend last night? b: a: were you in bed early on sunday? b: you!

Ну как я поняла, надо так 1. yes, i was 2. yes, she was 3. no, i wasn't 4. no, i wasn't

1.it/yesterday/rain? – was it rain yesterday? 2.enjoy/we/not/last/the film/sunday – we didn’t enjoy the film last sunday. 3.this kitten/tim/find/two days ago – tim found this kitten two days ago. 4.john/already/write/his essay/today – john has already written his essay today. 5.your/cousin/visit/europe/three/years/ago –your cousin visited europe three years ago. 6.your/brother/choose/his/next/car/yet – your brother hasn’t chosen his next car yet. 7.my/not/me/sister/meet/school/tomorrow/after – my sister will not meet me after school tomorrow. 8.home/why/always/textbook/he/at/leave/the? – why does he always leave the textbook at home?

|x|  +  y^2  +  z^2  -  2y  +  4z  +  5  =  0 |x|  +  y^2  -  2y  +  1  +  z^2  +  4z  +  4  =  0 |x|  +  (y  -  1)^2  +  (z  +  2)^2  =  0 |x|  > =  0    при  любом  х (y  -  1)^2  > =  0  при  любом  y (z  +  2)^2  > =  0  при  любом  z сумма  трёх  неотрицательных  выражений  равна  нулю,  когда  каждое  из них  равно  нулю. x  =  0,    y  -  1  =  0  >   y  =  1,    z  +  2  =  0  >   z  =  -2 ответ.      x  =  0,     y  =  1,     z  =  -2