(x^2+y^2)(z^2+t^2)=`(xz+yt)^2`+`(xz-yt)^2`

Làm giúp mình vs.mik đg cần gấp

We see some popular restaurants. They are on Nguyen hue street

Vẽ chibi nữ cầm cờ VN ôm trái bóng hô Việt Nam cố lên nhé <digi?> <full> NL : Dự đoán tỉ số đê:> Tui trc : 3 -1

Giúp em câu b với nha hứa vote crlhn

Cần trước 9h nha mọi người,giúp em với nhaaaaaaa

22/ Thanks to television,people can watch a _ of local and international programs on different channels. A.class B.group c.variety d.stage 23/ he doesn't let anyone__in the working tim . A. To taking B. to take .C . Talk D. Talks 24/ this is the girl __ mother is from Canada . A.What B. Whose c.whom d.who 25/ it's dark in here . Can I _the lights? A. Turn off B.Turn on C.turn in D. Turn up

Giúp ạ,cần trước 9h tối nay,cảm ơn tất cả mọi người nhìuuuuuuu

The book is good.The movie is good

XI. Đọc kỹ đoạn văn sau và chọn phương án đúng (A hoặc B, C, D) cho mỗi câu. (5đ) Traditionally in America, helping the poor was a matter for private charities or local governments. Arriving immigrants depended mainly on predecessors from their homeland to help them start a new life. In the late 19th and early 20th centuries, several European nations instituted public-welfare programs. But such a movement was slow to take hold in the United States because the rapid pace of industrialization and the ready availability of farmland seemed to confirm the belief that anyone who was willing to work could find a job. Most of the programs started during the Depression era were temporary relief measures, but one of the programs - Social Security - has become an American institution. Paid for by deductions from the paychecks of working people, Social Security ensures that retired persons receive a modest monthly income and also provides unemployment insurance, disability insurance, and other assistance to those who need it. Social Security payments to retired persons can start at age 62, but many wait until age 65, when the payments are slightly higher. Recently, there has been concern that the Social Security fund may not have enough money to fulfill its obligations in the 21st century, when the population of elderly Americans is expected to increase dramatically. Policy makers have proposed various ways to make up the anticipated deficit, but a long-term solution is still being debated. In the years since Roosevelt, other American presidents have established assistance programs. These include Medicaid and Medicare; food stamps, certificates that people can use to purchase food; and public housing which is built at federal expense and made available to persons on low incomes. Needy Americans can also turn to sources other than the government for help. A broad spectrum of private charities and voluntary organizations is available. Volunteerism is on the rise in the United States, especially among retired persons. It is estimated that almost 50 percent of Americans over age 18 do volunteer work, and nearly 75 percent of U.S households contribute money to charity. 76. It took welfare programs a long time to gain a foothold in the U.S due to the fast growth of………. . A. industrialization B. modernization C. urbanization D. population 77. The Social Security program has become possible thanks to ………….. . A. deductions from wages B. people’s willingness to work C. donations from companies D. enforcement laws 78. That Social Security payments will be a burden comes from the concern that ………….. A. elderly people ask for more money B. the program discourages working people C. the number of elderly people is growing D. younger people do not want to work 79. Persons on low incomes can access public housing through ………….. . A. low rents B. state spending C. donations D. federal expenditure 80. Needy Americans can seek help from ………….. . A. federal government B. government agencies C. state governments D. non-government agencies