тепловоз тянет вагон массой 2т с ускорением 0,2 м/с2 . определить силу тяги тепловоза,если сила сопротивления движению 10кН

Чему равно произведение действительныхз корней уравнения х в квадрате+3х-5=0 ?

|3x+7| больше или равно 0

нужно выбрать правильный ответ (времена Past Simple, Past Continous, Present and Past Perfect)

1. Tom and Alice ... married last week

a. got     b. have got

2. She doesn't live here anymore. She ... a new flat

a. has bought      b. had bought          c. bought

3. ... you ... a good time at the party last night?

a. Did have  b. Have had          c. Was having

4.... you ... hard when you were a student?

a.Did stady    b. have studied    c. had studied

5. This is the best book I ... ever ...

a. was reading    b. have read     c. had read