Giúp em bài này với ạ! Cho hình thang ABCD, có AD là đáy lớn, AC vuông góc CD, AC là tia phân giác của gócBAD. Biết chu vi hình thang là 20cm, gócD= 60 độ. Tính AD?

II. Circle the best answer: 1. ……. pollution happens when human activities destroy the Earth’s surface. A.Thermal B.Visual C.Noise D.Soil 2. Too much use of ………….. lights in cities may cause light pollution. A.traffic B.aquatic C.sign D.electric 3. Aquatic plants may aslo die …………… the polluted water. A.because B.because of C.since D.though 4. If the karaoke bar didn’t make so much noise almost every night, the ………. wouldn’t complain to its owner. A.neighborhoods B.visitors C.residents D.guests 5. In 1893, ….. became the first country in the world to give all women the right to vote. A.Canada B.New Zealand C.America D.Singapore 6. The name “Australia” comes from the Latin word “australis”, meaning ……… A.northern B.southern C.eastern D.western 7. The world’s largest reef system, the Great Barrier Reef, is found off the north-eastern coast of ……… A.Canada B.America C.New Zealand D.Australia 8. A number of other provinces will declare drought ……… in the coming weeks. A.accident B.emergency C.event D.situation 9. The Pacific Ring of Fire is an area of frequent ……….. and volcanic …….., encircling the basin of the Pacific Ocean. A.floods/eruption B.earthquake/flood C.earthquakes/eruptions 10. Skype is a voice ………. allowing users to talk to others across the world. A.hardware B.software application C.Internet access 11. Luckily, there are many communication techniques to help overcome ……… A.foreign languages B.cultural shocks C.language barriers 12. Seven of ten people prefer face-to-face …………when having a date. A.code B.sign C.language D.contact 13. How many times have I told you …………. footbal in the street? A.not to play B.do not play C.not playing D.will not play 14. She is looking forward ………. her grandparents again soon. A.see B.to see C.seeing to seeing D.to seeing 15. Recent ………. developments have made robots more user-friendly and intelligent A.science B.scientist C.scientific D.scientifically 16. Terrorists are using modern technology …….. their destructive work. A.about B.at C.for D.with 17. Titan, one of Saturn’s ………., has a thick atmosphere. A.satellite B.spaceships C.moons D.comets

Tìm miếng giấy hình chữ nhật có chiều dài 2/3m,chiều rộng 1/2m. Tính A.chu vi miếng giấy hình chữ nhật đó B.diện tích miếng giấy hình chữ nhật đó

Tìm GTNN của các biểu thức sau: a, A = 1,7 + l 3,4 - x l

Chọn đáp án đúng giúp mk nhé tks

bài 1 :tìm x phân tích đa thức thành nhân tử bằng phương pháp nhóm hạng tử a)(x-2)^2-(x-3)(x+3)=0 b)(3x-1)^2-16=0 c)5x^3-35x=0 d)(x-3)^2=4x^2-20x+25 e)x+x^2-x^3-x^4=0 f)(7x-5)^2-2(7x-5)(X+3)+(x+3)^2=0 hứa vote 5 sao hơi nhiều mng thông cảm ạ

Cách sử dụng filter app zoom trên điện thoại 💗

Calli: Khánh Ngọc Tên tôi đó calli hẳn hoi, màu tím càng đẹp Mai là sinh nhật bà tôi rồi

Cali: "Buồn" NL: Trung thu năm nay ko đc đi đâu cả, bị bắt ở nhà cách ly xã hỗi. Vừa BÙN VỪA CHÁN :(( - có ai phải cách ly xã hỗi ko???

Giải giúp em ạ 7. I said to her, “I must go now. ……………………………………………………………. 8. He said to me, “Keep silent, please” …………………………………………………………………… 9. The teacher told the students, “Please study harder” …………………………………………………… 10. “Please wait for me outside my room”, she said to me. …………………………………………………… 11. He said to me, “Can you me meet me next week” ……………………………………………………… 12. She told Nam, ‘Could you help me with my English” ………………………………………………… 13. He said to her, “You should stay in bed. “ ……………………………………………………………. 14. I said to her, “You should not stay up late” ……………………………………………………….. 15. Minh asked his father,” Can you carry this suitcase for me?” ……………………………………………… 16. She said to her son “Go straight upstairs and get into bed.” …………………………………………………