Can you help Thank you

In the future, try not to mention the girl's past, or even say things like "I don't care about your past" to her, because the more this happens, the more the girl will not forget about it, and after a while she will go back to her, don't say anything, and treat her as if nothing had happened.

Perhaps the reason why the girl became not that memory ......

I don't understand, what does it mean to be 5?

Solution: There are x number of female students.

1-20%)x＝16

x 20 girls and 16 boys.

There are a total of 16+20 36 (people) in five (2) classes

Make two auxiliary lines, and the area of the original shadow part is equal to the area of the new fan-shaped shape. It's easy to find this sector area. As shown below:

Too lazy to draw. Here's a hint for you. The rest of the calculations are fine.

Don't rush, need help, what can I help you.

First of all, you must have an interest in learning mathematics. More than 2,000 years ago, Confucius said: "Those who know are not as good as those who are good, and those who are good are not as good as those who are happy."

The world-renowned great scientist and founder of the theory of relativity, Albert Einstein also said: "In school and life, the most important motivation for work is the pleasure of work." "The joy of learning is the initiative and enthusiasm of learning, and we often see some students who spend a long time immersed in reading and thinking in order to figure out a mathematical concept; In order to solve a number study problem, he forgot to sleep and eat.

This is first of all because they are interested in mathematics learning and research, it is hard to imagine that people who have no interest in mathematics and have a headache when they see mathematics problems can learn mathematics well, to cultivate the interest in learning mathematics must first recognize the importance of learning mathematics, mathematics is known as the queen of science, it is a necessary tool for learning scientific knowledge and applying scientific knowledge. It can be said that without mathematics, it is impossible to learn other subjects well; Secondly, we must have the spirit of study, have the tenacity to learn well, and in the process of in-depth study, we can understand the mystery of mathematics and experience the joy of learning mathematics to achieve success. In the long run, it is natural to develop a strong interest in mathematics and stimulate a high degree of consciousness and enthusiasm for learning mathematics well.

With the interest and enthusiasm to learn mathematics, to learn mathematics well, it is also necessary to pay attention to study methods and develop good study habits.

Knowledge is the foundation of ability, and it is necessary to earnestly grasp the study of basic knowledge. The learning of basic mathematics knowledge includes three aspects: concept learning, theorem formula learning and problem solving. To learn a mathematical concept, we must be good at grasping its essential properties, that is, the properties that distinguish it from other concepts; To study theorem formulas, we must firmly grasp the intrinsic relationship of the direction of theorems, grasp the scope of application of theorem formulas and the types of problems, and apply these theorem formulas with ease, and solve mathematical problems on the basis of mastering concepts and theorem formulas, and complete the transformation from "unknown" to "known".

It is necessary to focus on learning various methods of transformation and cultivating the ability to transform. All in all, in the study of basic knowledge of mathematics, it is necessary to grasp the overall essence of knowledge, understand the laws and essence thereof, and form a closely related overall understanding system to promote the mutual transfer and transformation of various forms. At the same time, we should also pay attention to the fact that the process of knowledge formation is everywhere implied in people's ways, means and strategies to solve problems in teaching activities, and mathematical ideas and methods are everywhere as a guide, which is what we most hope to learn when learning knowledge.

These are all earned by your own efforts, don't be so resigned to fate, if there is really a master who says that you have no job in your life, you just wait at home, God will give anyone no less opportunities, so don't believe in fate too much. If you try hard,..

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