Tính ( 16/15 nhân -5/7 ) chia 8/14

Một cửa hàng có 132 kg đường , đã bán 1/4 số kg đường đó và 9 kg . hỏi cửa hàng còn lại bao nhiêu kg đường?

VII. Choose the correct answer A, B, C or D to fill each blank in the following passage. Hobbies are activities for entertainment. Hobby can cost you almost nothing. Music is the most popular. For example, many people play the guitar for(66)_____ in their free time. Sports provide other (67)_____ hobbies. Cycling, running, tennis, table- tennis are the sports that millions of people play during their free time. Some people’s coin collections are wonderful. There are still hundreds of (68)_____ collections, such as bottle collections, seashell collections, butterfly collections, and so on. For some people, a hobby is a favourite (69)_____ , like chess. In chess, we need two or more people (70)_____ . 66. A. fun B. funny C. funnies D. funniest 67. A. strange B. normal C. favourite D. unusual 68. A. another B. other C. others D. the other 69. A. exercise B. game C. interest D. sports 70. A. play B. to play C. playing D. to playing VIII. Read the passage, and then decide whether the statements are true (T) or false (F). Volunteering is one of the things that are very useful to you. To your future bosses, volunteer work shows that you are interested in both the world and your future. Although volunteer work does not bring you money, it gives you a time to learn social skills and make a difference in our community. Volunteers have the chance to teach English, arts, and sports for homeless children. They also help children with health problems, especially children who cannot see, hear and speak. True False 71. Doing volunteer work is very useful to you.   72. Volunteering is good for your future job.   73. You can earn a lot of money from volunteering.   74. Volunteers can help homeless children to learn English, arts, and learn   how to play sports. 75. Volunteers only help healthy children.  

Giải hệ bất phương trình sau: $\left\{\begin{array}{l}x^2-xy+16y^2\ge 0\\2x^2+34y^2\ge 0\\3y-5\ge 0\\2x-4\ge 0\end{array}\right.$

Cho ($x^{2}$ + 3)($x^{2}$ + 5)($x^{3}$ + 9)($x^{2}$ + 11) chia cho $x^{4}$ + $14x^{2}$ + 17

Giúp mình với mình đang gấp lắmmm

Biết xx//yy OAX=40,OA vuông góc OB.Tính OBY

khi xóa đi chữ số hàng trăm của một số tự nhiên có 3 chữ số thì số đó giảm đi 5 lần tìm số đó

cho amoniac (dạng nước:NH4OH),quỳ tím,dụng cụ và thiết bị cần thiết khác có đủ hãy trình bày và vẽ mô hình các thí nghiệm về sự lan tỏa chất

thể tích của 0,5 mol CO2 điều kiện tiêu chuẩn là