Cho tam giác ABC nhọn.2 đg cao BD,CE cắt nhau tại H. Kẻ tia Bx vuông góc với CA.Tia Bx cắt tia Cy tại K a)CM:Tứ giác BHCK là hình bình hành b)Gọi O là trung điểm của BC.CM:H,O,K thẳng hàng

Giúp mình với ạ mình đang cần gấp lắm ạ

bài 2: a, 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 b, 25 + 25 + 25 + 25 + 25 + 25 + 25 + 25 c, 45 + 45 + 45 + 45 + 15 + 15 + 15 + 15 d, 2 + 4 + 6 + 8 + 10 + 12 + 14 + 16 + 18 e, 125 + 125 + 125 + 125 - 25 - 25 - 25 - 25 các anh cj lm hay nhất nhanh nhất đúng em cho ctlhn

Bài 1: Cho a / b+ c + d = b / a + b + d = c / a + b + d = d / a + b + c. Tính giá trị của M = ( a + b / c + d ) + ( b + c / a + d ) + ( c + d / a + d ) + ( d + a / b + c ) Bài 2: Tìm x , y biết rằng: 1 + 2y / 18 = 1 + 4y / 24 = 1 + 6y / 6x Cứu '-'

Giải ngắn gọn dễ hiểu dùm e với ạ

Vẽ sơ đồ tư duy địa lý 8 bài1 bài2 bài3 gộp lại

III. REARRANGEMENT 1. work / to / go / after / and / visit / I / have 2. and / fish / vegetables / go / yourself / ought / to / the / market / you / to / to / buy / some 3. sorry, / to / but / cook / I’m / yourself . / have / you’ll / dinner 4. ask / at / house / call / Aunt / meet / Grandma’s / Chi / her / me / You / to / do 5. a / locked / You / put / must / all / cupboard. / in / drugs / and / chemicals IV. SENTENCE TRANSFORMATION 1. Driving too fast is dangerous. 2. They plan to invite her for dinner tonight. 3. That poor girl can’t speak. She can’t hear, either. 4. The children liked to swim in the rain. 5. How carefully he drives!

II. Complete the sentences using the Present Simple of the verbs in brackets 1. Kate (study) ________________________ Vietnamese at school 2. They (speak) ____________________ Japanese at home. 3. My mother (not walk) ___________________ to work every day 4. We (use) ________________ dictionaries in class. 5. My friend’s father (teach) _______________ Spanish at university. 6. David (watch) _________________ American DVD 7. Thanh (go) ___________________ to school early. 8. She (do) __________________ her homework in the afternoon. 9. Mai (walk) ____________________ to school every morning. 10. I (not want) ________________ to go out when it is rain y.

khoanh giúp mình vs mình cảm ơn

giúp mình đi ạ :(( giải thích hộ mình luôn nha