Предмет: Математика, автор: mariakozlova206

(2х+5)²-(3+х)²=
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Автор ответа: djdjbxncoak
1

Ответ:

(2х+5)² - (3+х)² = (4х² + 20х + 25) - (х² + 6х + 9) = 3х² + 14х + 16

Автор ответа: tatsach
1

Ответ:

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So, you are between the ages 13 and 19. What makes you happy? A worried, weary parent might imagine the answer to sound something like this: a little rock’n’roll, maybe some cash, or at least the car keys. It turns out the real answer is quite different. Spending time with family was the top answer to that open-ended question, according to an extensive survey – more than 100 questions asked of 1,280 people ages 13–19 – conducted by The Associated Press and MTV on the nature of happiness among America’s young people. Next was spending time with friends, followed by time with a significant other. And even better for parents: nearly three-quarters of young people say their relationship with their parents makes them happy. “They’re my foundation,” says Kristina St. John, 17, a high-school student from Queens in New York. “My mom tells me that even if I do something stupid, she’s still going to love me no matter what. Just knowing that makes me feel very happy and blessed.” Other results are more disconcerting. While most young people are happy overall with the way their lives are going, there are racial differences: the poll shows whites to be happier, across economic categories, than blacks and Hispanics. A lot of young people feel stressed, particularly those from the middle class, and females more than males. You might think money would be clearly tied to a general sense of happiness. But almost no one said “money” when asked what makes them happy, though people with the highest family incomes are generally happier with life. However, having highly educated parents is a stronger predictor of happiness than income. All parents, here is some more for you: most young people in school say it makes them happy. Overwhelmingly, young people think marriage would make them happy and want to be married some day. Most also want to have kids. Finally, when asked to name their heroes, nearly half of respondents mentioned one or both of their parents. The winner, by a nose: Mom.

1.According to the survey conducted by The Associated Press and MTV, what was the top answer regarding what makes teenagers happy?
a) Rock'n'roll music
b) Cash
c) Spending time with family
d) Having car keys
2.What ranked second as a source of happiness for teenagers in the survey?
a) Spending time with family
b) Spending time with friends
c) Earning money
d) Having a car
3.Who did teenagers in the survey say makes them the happiest among the following options? a) Siblings
b) Teachers
c) Significant other
d) Friends
4.Approximately what percentage of young people in the survey reported that their relationship with their parents makes them happy?
a) One-quarter
b) Half
c) Nearly three-quarters
d) None
5.According to the survey, which racial group appeared to be the happiest?
a) Whites
b) Blacks
c) Hispanics
d) Asians
6.Which demographic group, when considering happiness, was shown to be more stressed in the survey?
a) Males
b) Females
c) Middle-class individuals
d) Wealthy individuals
7.What was the surprising finding regarding the relationship between money and happiness in the survey?
a) Most teenagers mentioned "money" as a source of happiness.
b) High family income was strongly correlated with happiness.
c) Having highly educated parents was a better predictor of happiness than income.
d) Low-income teenagers reported the highest levels of happiness.
8. According to the text, what do most young people say about school?
a) It makes them unhappy.
b) It doesn't affect their happiness.
c) It makes them happy.
d) They prefer not to answer.
9.What is the overwhelming opinion of young people regarding marriage, based on the survey?
a) They have no interest in marriage.
b) Marriage would not make them happy.
c) Most want to get married someday.
d) Only a few want to get married.
10.Who was mentioned as the most commonly named hero among the respondents in the survey?
a) A rock star
b) A fictional character
c) One or both of their parents
d) A celebrity other than their parents
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