Tìm x;y t/m: /3x-4/+/3y+5/=0 / là dấu giá trị tuyệt đối.

Giúp em bài 13 câu a) b) vs ạ Em cảm ơn

tổng của 2 số có 3 chữ số là 836 > số thứ 1 có chữ số hàng trăm là 5 số thứ 2 có chữ số hàng trăm là 3 > nếu gạch bỏ số 5 và 3 thì dc 2 số có 2 chữ soosmaf số này = 2 số kia . Tìm 2 số đó

Vẽ 1 chàng trai đang cầm súng nhé, mặt thì có vài cái băng go và 1 ít máu nhé. Vẽ bằng bút chì không tô màu nhé. Ký Cuong will protect Ngoc for the rest of his life -GOOD LUCK-

Cho ΔABC có đường cao AH. Kẻ HE ⊥ AB tại E, kéo dài HE lấy EM=EH. Kẻ HF⊥AC tại F, kéo dài HF lấy FN=FH. Gọi I là trung điểm của MN. Chứng minh rằng : a, AB là trung trực của MH và AC là trung trực của HN b,ΔAMN cân

rau muống và cà chua để tủ lạnh trồng đc ko

Cho tam giác ABC trong đó BC = 11cm , góc ABC =38 độ góc ACB= 30 độ gọi điểm N là chân của đường vuông góc kẻ từ A đến cạnh BC . Hãy tính đoạn thẳng AN và cạnh AC

kq phần rút gọn của S=2/căn x-3 nha các bn Tìm x để S=1 Tìm x để S<0 m.n giúp mik vs ạ mk cảm ơn

Mark the letter A, B, C, or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions. Question 1: A. washed B. formed C. turned D. boiled Question 2: A. house B. mouth C. could D. found Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in the position of primary stress in each of the following questions. Question 3: A. inform B. explore C. prevent D. cancel Question 4: A. attitude B. manager C. invention D. company Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions. Question 5: My parents hope to travel around ______ world next summer. A. a B. an C. the D. Ø (no article) Question 6: If you watch this film, you ______ about the cultures of Southeast Asian countries. A. learned B. were learning C. will learn D. would learn Question 7: Paul noticed a job advertisement while he ______ along the street. A. was walking B. would walk C. walked D. had walked Question 8: Solar energy is not widely used ______ it is friendly to the environment. A. since B. although C. in spite of D. because of Question 9: The sign warns people ______ the dangers of swimming in this river. A. about B. from C. with D. to Question 10: ______, they were surprised to find their favourite band playing there. A. On arrival at the party B. To have attended the party C. They had arrived at the party D. Just attended the party Question 11: Once ______ in large quantities, these products will be more affordably priced. A. are produced B. having produced C. produced D. producing Question 12: Jane would never forget ______ first prize in such a prestigious competition. A. to be awarded B. being awarded C. to have awarded D. having awarded Question 13: You should turn off the lights before going out to save ______. A. electricity B. electrify C. electric D. electrically Question 14: ______ school fees may discourage many students from attending university. A. Gaining B. Receiving C. Improving D. Raising Question 15: Drinking too much alcohol is said to ______ harm to our health. A. make B. do C. lead D. take Question 16: At the end of the training course, each participant was presented with a ______ of completion. A. degree B. certificate C. diploma D. qualification Question 17: The ______ high levels of pollution in the coastal areas are a matter of great concern to the government. A. redundantly B. intensively C. marginally D. excessively Question 18: Event organisers should plan everything carefully so as to leave nothing to ______. A. possibility B. mistake C. opportunity D. chance

Tìm GTNN E=(x+y)^2+(x-2)^@+(y+1)^2+20 F=x^2+5y^2+3z^2+-4xy+2yz-2xz+6x-16y-20z+41