Bài 1. Cho hàm số y = (1 - 4m)x + m - 2 (d) a) Với giá trị nào của m thì (d) đi qua gốc tọa độ ? b) Với giá trị nào của m thì đường thẳng (d) tạo với trục Ox một góc nhọn, một góc tù ? c) Tìm giá trị của m để đường thẳng (d) cắt trục tung tại một điểm có tung độ bằng – 4 d) Tìm giá trị của m để đường thẳng (d) vuông góc với đường thẳng y = 2x + 3 Bài 2. Cho hàm số y = (a2 - 2a + 4)x - 9 Chứng minh rằng hàm số trên đồng biến trên R

Giúp mik giải với mng ơi , đừng spam nha

sắp xếp các phân số sau : 21/49 ; 62/97 ; 93/140 theo thứ tự tăng dần

tra loi giup minh cau 1 2 4 5 nhe moi nguoi

Giúp mình câu cuối vs nha mấy ban.

Giúp e hai câu này với ạ.đúng E Veto cho 5 sao luôn t

1. A __________is a type of book that is based on imagined scientific discoveries of the future. * A. novel B. science fiction book C. fiction book D. romance 2. Jack ................ yet, otherwise he would have telephoned me * A. mustn't have arrived B. shouldn't have arrived C. can't have arrived D. needn't have arrived 3. Why wasn't your boyfriend at the party last night?" - "He ................. the lecture at Shaw Hall. I know he very much wanted to hear the speaker" * A. should have attendedB. can have attendedC. was to attendD. may have attended 4. “I stayed at a hotel while in New York.” - “Oh, did you? You _____ with Barbara.” * A could have stayed B. could stay C would stay D. must have stayed 5. We _____ last night, but we went to the concert instead. * A. must have studied B. might study C. would have studied D. would study

IV. Put the words/ phrases from the box in each space to complete the following sentences. Zebra crossing - railway station - speed limit - traffic jams - road user- means of transport - driving license - safety helmet - road safety - train tickets 1. The government has introduced a new __________________ campaign in an attempt to reduce the number of road accidents. 2. A __________________ is a hard hat which covers and protects the whole head, worn especially by motorcyclist. 3. We looked on our map to find the way to the __________________. 4. Roadworks have caused __________________ throughout the city centre. 5. A __________________ is a place on a road at which vehicles must stop to allow people to walk across the road. 6. You should know the regulations in order to become a good ______________. 7. A ________________ is an official document that shows you are able to drive. 8. Slow down because you’re breaking the __________________. 9. We needed to get to Ha Noi, but we had no __________________. 10. I have two ___________ available to go to Lao Cai. Would you like to go with me to Sa Pa?

Một mảnh đất hình tam giác vuông có tổng 2 cạnh góc vuông là 60m.cạnh góc vuông này bằng2/3 cạnh góc vuông kia.Tính diện tích mảnh đất đó

Cho mình biết đáp án bài này với em cảm ơn ạ