tam giác ABC vuông tại A, đường cao AH. Gọi I và K lần lượt là hình chiếu của H trên AB và AC. Đặt AB= c, AC= b a) tính AI,AK theo B,c b) chứng mình rằng BI/CK= c ³/b ³

I.Rewrite the sentences: (2) 11.His father asked him to go stay at home because he was sick. => Because of ______________________________________. 12.She failed the University entrance exam because her grades were bad. => Because of _____________________________________________. 13.Because there was an accident, I was late. => Because of _______________________. 14.Because the rain was so heavy, I couldn’t go to school. => Because of _________________________________. 15.Because of the cheap price, my wife insists on buying the Tivi. => Because __________________________________________. 16.Although it was raining heavily, we still went to school. => Despite / In spite of ____________________. 17.Although Nam is not an intelligent student, he can learn very fast. => Despite / In spite of _______

Cho `x>1,y>1,x+y=6.`Tìm GTNN của `S=3x+4y+5/(x-1)+9/(y-1)`

Bài 6 giúp e ạ Có 3 câu a,b,c đừng lm thiếu nhé ertrydntsebw

I.Rewrite the sentences: (1) 1. Although Nam is not an intelligent student, he can learn very fast. => Despite / In spite of ______________________________________. 2. Because Hoa was rich, she could buy that house. => Because of _____________________________. 3. Because the rain was so heavy, I couldn't go to school. => Because of _________________________________. 4. His father asked him to go stay at home because he was sick. => Because of ______________________________________. 5. Because there was an accident, I was late. => Because of _______________________. 6. She failed the University entrance exam because her grades were bad. => Because of _____________________________________________. 7. Although he has a physical handicap, he has become a successful business man. => Despite ________________________________________________________. 8.Because I studied hard, I passed the exam. => Because of ________________________. 9.Because Hoa was rich, she could buy that house. => Because of _____________________________. 10.Although he has a physical handicap, he has become a successful business man. => Despite ________________________________________________________.

Cho 3 đường thẳng AB, CD, EF cắt nhau tại O, biết AOE = 30 độ. Tính số đo các góc: BOF, AOF, BOE

Phân tích đa thức thành nhân tử

CHO HỎI TẠI SAO AC LẠI =12 ,AB=9 VẬY AK

Viết phương trình chứng minh muối nhôm tan trong nước tạo môi trường có tính axit

Giải thích ra giúp mình vs ạ. Mình gấp lắm. Mình hứa sẽ tim và vote 5* đầy đủ ạ. Ctlhn cho bạn nào nhanh nhất ạ