При каком значении а наименьшее значение функции у= 2х^2+6х+а равно 4? а)-13 б)13 в)-32 г)8, 5

Это парабола, ветви вверх, значит наименьшее значение достигается в вершине  по условию минимум равен 4, т.е.

1yes, it was great 2it was only three o'clock in the afternoon when we got there 3so we watched as they(группа) were setting up the speakers for the sound system 4since we had helped earlier we were allowed to sit at the edge of the stage.8 john: as for me, i was happy because i had had the chance to see my favourite band and talk to svyatoslav in front of five thousand people. terry: i felt exhausted, but also delighted. i enjoyed the concert very much. 5 the best moment of the concert for me was when svyatoslav vakarchuk and his team appeared. i couldn't believe it when he walked out. i felt very excited to be so close to my favourite singer.6 told us to enjoy the show.7 he(солист) started singing all of his hits. we all joined him and danced to the music. 9 speak about music and favourite singers

1) 3 + 11х = 43 + х перенесем 3 в правую часть со знаком минус (по правилу переноса из одной части уравнения в другую): 11х = 43 - 3 + х 11х = 40 + х перенесем х в левую часть со знаком минус: 11х-х = 40 10х = 40 так как 10 умножить на х равно 40 - то х будет равен 40 разделить на 10: х = 40/10 х= 4 2)25 - 3у = 39 - 5у перенесем 25 в правую часть: -3у = 39 - 25 - 5у -3у = 14 - 5у перенесем "-5у" в левую часть со знаком уже плюс: -3у + 5у = 14 2у = 14 у = 14/2  y = 7 3) 7x = 24 + 3x перенесем 3х в левую часть со знаком минус: 7x -3x = 24 4x = 24 x = 24/4 x = 6 ответ: 1) 4; 2)7; 3)6.