Cho đường thẳng (d):y = ax + b . Xác định a , b để
1) (d) đi qua hai điểm A(1;3) và B(-3 ; -1)
2) Có hệ số góc bằng 3 đi qua điểm B(2;2)
3) Đi qua M(2;-3) và song song với đường thẳng y = -2x+1
4) Vuông góc với đường thẳng y = 3x-2 và đi qua điểm N (-2;1)
5) (d) cắt trục hoành tại điểm có hoành độ bằng 1 và song song (d’) : y = -2x + 2017
Các bạn giải gấp cho mk câu này nha . Mk đang cần rất gấp bạn nào giải đúng mk tick cho .
Các bạn giải gấp cho mk nha . Mk đang cần rất gấp bạn nào giải đúng mk tick cho
Tìm m để các hàm số sau là hàm số bậc nhất , là hàm số đồng biến , là hàm số nghịch biến
1) y = \(\sqrt{1-2m}.x-m\)
2) y = \(\sqrt{3+2m^2}.x-1\)
3) y = (\(\left(m^2-2m+1\right)x-m\)
Rewrite these sentences , using “used to ’’, “didn’t use to’’ , “Did ... use to’’
1. My mum lived in a small village when she was a girl
-> My mum ...
2. There are more vehicles on the roads now .
-> There did not ...
3. We cycled to school two years ago.
-> We ...
4. There didn’t use to be many traffic accidents before
-> Now there are
5. My uncle was a bus driver some years ago, but now he has a desk job
-> My uncle ....
6. When I was a child , I watched cartoon on TV . I don’t watch cartoons anymore
-> I ... , but I don’t anymore
7. Did you go to a kinder garden when you were a child ?
-> Did .... ?
8. When I was a child , I cried a lot. I don’t cry a lot now.
-> I ... , but I don’t anymore
..Use “used to’’ or “didn’t use to’’ with the right form of the verbs in brackets to complete sentences
1. My brother ... interested in Geography when he was at school (not/be)
2. It might surprise you to know that he ... a wild life (lead)
3. Paper money ... on these Pacific islands (not/be used)
4. When David was young , he ... of becoming a magician (dream)
5. Our school ... elective subjects (not/have)
6. This was my favorite bicycle. I ... everywhere on it (ride)
7. Entertainment for the children in my village... as simple as playing hide and seek, or going swimming in the river (be)
8. Houses... in light yellow only . They were not as diverse in color as they are now. ( be painted )
Change these sentences in repoted speech
1. “Shall we go somewhere for a cup of coffee after class ? ’’ Tom said .
2. “Should I phone him now?’’ the girl wondered.
3. “ Should I agree to have a date with him ? ’’ the young girl wondered .
4. “Should we take a taxi or walk to the museum ?’’ They wondered