6) If it doesn't do homework, it will make many mistakes in the text.
7) If you want to earn much, you have to work much.
8) It makes progress in mathematics.
9) I would like that you gave the report on this subject.
вот и все)))

Ответы и объяснения

1) Why you decided to help them?
Если можно всё переведите... пожалуйста