Cho hình thang cân ABCD (AB // CD) có AB 8cm; CD 20cm chu vi hình thang là 48cm. Tính đường cao của hình thang

Biết góc nội tiếp ABC của đường tròn (O) có số đo bằng 30 độ. Số đo của cung nhỏ AC bằng ?

I. Choose the best answer A, B, C or D to complete the sentences: 1. A person who acts in a comedy is a __________ . A. reporter B. comedian C. film producer D. MC 2. ________ TV channels are there in Viet Nam? A. What B. When C. How many D. How often 3. __________ the Haunted Theatre is frightening, children love it. A. Because B. So C. But D. Although 4. Hoa likes _________ weather because she can go swimming. A. hot B. cold C. rainy D. wet 5. He __________ late for school. A. never is B. is never C. go never D. are never 6. _________ eat too much salt. It’s not good for you. A. Don’t B. Do ​ C. Please ​ D. Can’t 7. What’s your favourite_____________?-I like Tom and Jerry. A. subject ​ B. game​ C. sport ​ D. cartoon 8. If he __________my car, I’ll give him $5. A. washes B. wash C. will wash ​ D. washing 9. I have studied English __________ 2000. A. in ​ B. at​ C. since​ D. for 10. That is the _________ book I’ve ever read. A. most bored ​ B. borest​ C. boring D. most boring II. Supply the corect tense or form of the verb in parentheses. 1. If it ( rain)…………………………….. tonight, I won’t go for a walk. 2. Duy is not reading now. He ( watch)…………………… a game of tennis on TV. 3. They ( never see)………………………………………. such a big flower. 4. The USA ( have)…………………………………. colour TV in 1953. 5. You shouldn’t ( eat)……………………………….. food in this canteen.

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cho biểu thúc A= x - 2√x -1 a) Tìm điều kiện xác định của A b) Tính A khi x = 17 c) chứng minh rằng với x thỏa mãn điều kiện thì A ≥ 0, Tìm x để A=2

Giúp mk vs, mk đang cần gấp Bạn hãy viết lại các câu sau với từ gợi ý, không thay đổi nghĩa của câu. My brother learns English well. My brother is ________________________________________________________. His house is near his school. His house isn’t _______________________________________________________. How heavy is your sister? What ____________________? Thanks!

II. Click to choose the best answer for each following sentence. Chọn một đáp án đúng cho mỗi câu dưới đây. 1. The restaurant _____ we had our dinner was the most luxurious in this city. A. which B. where C. that 2. The man _____ I was speaking has just come back from Fuji mountain. A. to whom B. that C. whom 3. Is that the same dog _____ we saw last night? A. which B. that C. which/ that 4. This book is an introduction to Indians _____ culture started in the medieval period. A. whose B. which C. that 5. Is there any reason _____ students often don’t want to talk in presentations? A. in which B. why C. what 6. Thanks to modern technology, people _____ steal from shops can be identified by using closed circuit television. B. whom C. whowhose 7. The sun, _____ has a surface temperature of 60000oC, warms the Earth from a distance of 150 million km. A. which C. that C. which & that 8. Sunday is the day _____ most of the Christian usually go to church. A. in which C. which C. when

mọi người giải hộ mình nhanh với

Tìm ảnh của đth (d) : 2x+3y-4=0 qua phép vị tự tâm A, tỉ số k=3. Biết A(2;0).

2x-1/3=4y/5 , 3/2y=6/2z-1 và 5x-6y+7z mình sẽ cho hay nhất nếu làm nhanh