помогите с уравнениями реакций, нужно расставить коэфициенты: 

 СО2+Са(ОН)2=СаСО3+Н2О

 С2Н6+О2=СО2+Н2О

Раскройте скобки употребляя глаголы в форме Past Simple  ,Past Continuous , Past Perfect .

He ( to do ) his lessons by five oclock and at five he (to play) football in the yard .

Gery ( to be ) at home when you (to arrive) ? - No he (to go ) to school.

My parents ( to come ) home by seven oclock and at seven we ( to have ) dinner /

His father ( to look) tired as he ( to work) hard before .

By eight oclock I ( to learn ) a poem and at eight oclock I ( to watch) TV.

When he ( to see) me I ( to read ) the bewspaper which ( to buy) in the street .

Beth just ( to go ) home  when I ( to phone ) her .

When Alison ( to enter ) the house she ( to see) that her son ( to play ) with a ball .

which she (to buy ) in the shop .

They ( to arrive ) to the theatre late . The play already ( to begin ) .

When I ( to come ) into her room she ( to play ) the piano which her father ( to buy).

(x^3+8)/(x-2)*(x^2-4x+4)/(x^2-2x+4) Помогите пожалуйста, вроде решила, но ответ не сходится...

461038: 527=874(остаток 440)

Нужно изменить делимое чтобы оно делилось на тот же делитель только без остатка.

3 предложение с однородными членами предложения