Пусть a и b - целые числа, причем a > 0 и b < 0.Сравните с нулем: а)a*b б) (-a)*b в) a * (-b) г) (-a)*(-b) Проиллюстрируйте каждый случай конкретным примером.

CuO+2HCI=CuCI2=H2O=63.6 кДж

помогите    придумать ребусы

помогите вместо точек вставить нужные слова)

слова для вставки:

a)  inspire

 b)  responsible

c) will

d) challenge

e) create

f) dedicate

предложения в которые необходимо вставить слова:

1. her stories have been an.... to children to draw wonderful illustrations
2. Will someone take ... for decorating the hall for our meeting?
3. We were impressed by his ... to listen and learn.
4. He is taking part in a new project. It is very ...
5. The local government is going to provide money for the ... of a new sportsground near our school.
5. The presentation was a success, thanks to the ... of all our students.