Chọn giúp mình 5 câu này với@!!!

( 2x + y ) mũ ba, giúp mình nha

Tìm giá trị lớn nhất nhỏ nhất câu b

tìm giá trị cực tiểu của hàm số kẽ BBT câu 5) a) y= $\frac{x^{2}}{4}$ + 2x+3 b) y = -5x² -10x+3 c) y = (x³)/3 + 4x² + 7x

Mark the letter ABCd to the indicate the word whose Tressa position differs from the rest in the each of the following quetions A: prepare B rubbish C househoil D childrej

Làm giúp mik với,mik đag cần gấp

The family in Britain is changing. The once typical British family headed by two parents has undergone substantial changes during the twentieth century. In particular there has been a rise in the number of single-person households, which increased from 18 to 29 per cent of all households between 1971 and 2002. By the year 2020, it is estimated that there will be more single people than married people. Fifty years ago this would have been socially unacceptable in Britain. In the past, people got married and stayed married. Divorce was very difficult, expensive and took a long time. Today, people's views on marriage are changing. Many couples, mostly in their twenties or thirties, live together (cohabit) without getting married. Only about 60% of these couples will eventually get married. In the past, people married before they had children, but now about 40% of children in Britain are born to unmarried (cohabiting) parents. In 2000, around a quarter of unmarried people between the ages of 16 and 59 were cohabiting in Great Britain. Cohabiting couples are also starting families without first being married. Before 1960 this was very unusual, but in 2001 around 23 per cent of births in the UK were to cohabiting couples. People are generally getting married at a later age now and many women do not want to have children immediately. They prefer to concentrate on their jobs and put off having a baby until late thirties. The number of single-parent families is increasing. This is mainly due to more marriages ending in divorce, but some women are also choosing to have children as lone parents without being married. 1: which of the following could be the best title forr the passage ? A. changing vuales and norms of the british family B. changes inn marriage among british young generations C. changing insights into and ideas of the british family D. changes in viewpoints and lifestyles of british couples 2: the word WHICH in the passage refers to .... A. the family in britain B. substantial changes C. typical british family D. single-parent household 3: which of the following is NOT true according to the passage A. in the past british people had to pay a lot if they wanted to get divorced B. half of the children in britain now are born to unmarried couples C. women in britain now do not want to have children right after marriage D. there are more and more single - parent families in britain these days 4. The phrase "put off" in the passge mostly means_______ A. do not want B. delay C. start D. do not ỉtend 5. Which of the following best describes the overall tone of the passage? A. informative B. positive C. negative D. predictive

Giúp em câu này với mọi người ơi !

Bài tập 1: Ở một loài ruồi mắt đỏ trội hoàn toàn so với ruồi mắt đen. Cho cá thể ruồi mắt đỏ giao phối với ruồi mắt đen thì kết quả về kiểu gen và kiểu hình ở F1 và F2 như thế nào?Từ đó em có nhận xét gì về sự phân bố kiểu hình của F2 ở hai giới. Bài tập 2: khi lai hai thứ hoa thuần chủng màu đỏ và màu trắng với nhau thu được F1.Cho F1 tự thụ phấn với nhau ở F2 thu được 103 hoa đỏ : 31 hoa trắng a.Biện luận và viết sơ đồ lai từ P đến F2. b.Xác định cây hoa đỏ thuần chủng ở F2 bằng cách nào?

Một ca nô đi xuôi dòng nước từ điểm A đến điểm B hết 30 phút. Nếu ca nô đi ngược dòng nước từ B về A hết 45 phút. Nếu ca nô tắt máy trôi theo dòng nước thì thời gian đi từ A đến B là