Для учнів класу приготували однакові подарунки. В усіх подарунках було разом 588 цукерок, 140 яблук і 252 горіхи. Скільки учнав в класі, якщо їх більше ніж 20?

Choose the correct answer. 1.’What time does the train leave?’ ‘I think it ..A.. at 2 o’clock.’ A leaves B has been leaving C has left 2.’Where are Tom and Pauline?’ ‘ They ……. to the supermarket.’. A have just gone B has been going C go 3. ’What is Jill doing these days?’ ‘She …… for a job for six months.’ A is looking B has been looking C looks 4. ’Is Mandy watching TV?’ ‘No. She …… her homework right now.’ A is always doing B is doing C does 5. ’Have you been for a walk?’ ‘Yes. I often …… for walks in the evening.’ A have gone B am going C go 6. ’Have you seen any films lately?’ ‘Yes. Actually I …… two this week.’ A have seen B am seeing C see 7. ’What……?’ ‘It’s a piece of cherry pie. Mum made it yesterday.’ A are you eating B do you eat C have you eaten 8. ’Are you going on holiday this summer?’ ‘Yes. I ……. enough money.’ A am saving B have already saved C save 9. ’Is Todd reading the newspaper?’ ‘No. He …….. dinner at the moment.’ A has been making B makes C is making 10. ‘Have you bought any new CDs recently?’ ‘Yes. Actually I …… two this week.’ A have bought B have been buying C am buying

Найдите наибольшее значение линейной функции y=-3x+5 на промежутке [-5;7]