7 класс,попробуйте составить небольшое поучение младшим брату или сестре или другу,использовав слова ,;"приветить","молвить,"почет"и т .д.

найди значение выражения 1)8a+250 при a =12;15; 2) 14(b+12) при b = 13;18. 

за 5 с скорость шарика возросла с 2м/с до 5м/с. определите ускорение шарика

Ask people to help you in these situations. Example:You can't hear what the teacher is saying very well.-Could you speak louder,please? 1)You don't know what this word means. 2)You can't find your pen to write down a word. 3)You want to know the time. 4)You didn't understand what your parther said. 5)You want to leave a message for your friend.