问题 解答题

某商场购进一种单价为40元的篮球,如果以单价50元出售,那么每月可售出500个,根据销售经验,售价每提高1元,销售量相应减少10个.

(1)假设销售单价提高x元,那么销售300个篮球所获得的利润是( )元;这种篮球每月的销售量是( )个 .(用含x的代数式表示)

(2)若每月销售这种篮球的最大利润是8000元,又要使顾客得到实惠,则商场需要涨价多少?

答案

解:(1)300(10+x);500﹣10x;

(2)(10+x)(500﹣10x)=8000,

  (10+x)(50﹣x)=800,

  ﹣x2+40x﹣300=0,

x2﹣40x+300=0,

(x﹣10)(x﹣30)=0,

解得x1=10,x2=30,要使顾客得到实惠,∴x=10.

答:要使顾客得到实惠,应涨价10元.

问答题
阅读理解

In the West, advertisements are the fuel that makes mass media work. Many TV stations, newspapers, magazines, radio stations are privately owned. The government does not give them money. So where does the money come from? From advertisements. Without advertisements, there would not be these private businesses.

Have you ever asked yourself what advertising is? Through the years, people have given different answers to the question. For some time it was felt that advertising was a means of "keeping your name before the public" And some people thought that advertising was "truth well told" Now more and more people consider it in this way; Advertising is the paid, non-personal, and usually persuasive presentation of goods, services and ideas by some certain sponsors (发起人) through various media

First, advertising is usually paid for. Various sponsors pay for the advertisements we see, read, and hear over the various media. Second, advertising is non-personal. It is not face-to-face communication. Although you may feel that a message in a certain advertisement is aimed directly at you, in reality, it is directed at large groups of people. Third, advertising is usually persuasive. Directly or indirectly it asks people to do something. All advertisements try to make people believe that the product, idea, or service advertised can benefit them. Fourth, the sponsors of the advertisement must show their names. From the advertisement, we can see if the sponsor is a company, or a single person. Fifth, advertising reaches us through old and modem mass media. Included in the old media are newspapers, magazines, radio, television, and films. Modem media include emails, matchbox covers, and boards on top of buildings.

9. The existence of the privately owned mass media depends on the support of ________.

A. the government     B. their owners’ families      

C. advertisements       D. the TV stations

10. The passage seems to say that different ideas of advertising are given due to ________.

A. the change of time                      B. the subject of the advertisements

C. people’s age difference                    D. people’s different opinions

11. Which of the following is considered modem mass media?

A. Newspapers.       B. Emails.        C. Magazines.          D. Films.

12. According to the passage, which of the following statements about advertisements is NOT true?

A. The sponsors are always mentioned.       

B. Advertising must be honest and humorous.

C. There is the description of things advertised.         

D. Advertising is meant for large groups of people.