Title:

In the sales of clothing cabinets in a shopping mall, it is found that a certain brand of children's clothing can sell an average of 20 pieces every day, and each piece makes a profit in 40 yuan. In order to welcome the "June 1st" International Children's Day, the shopping mall decided to take appropriate price reduction measures. According to market research, if the price of each children's wear is reduced by 4 yuan, then on average, eight more children's wear can be sold every day. If you want to sell this kind of children's clothing at an average daily profit of 1200 yuan, how much should you reduce the price of each child's clothing?

A travel agency has introduced the following charging standards to attract citizens to a scenic spot:

If the number of people does not exceed 25, the per capita travel cost is 1000 yuan.

If the number of people exceeds 25, the per capita travel expenses will be reduced by 20 yuan for every increase of 1 person, but the per capita travel expenses shall not be lower than that of 700 yuan. A unit organized employees to travel to this scenic spot, and * * * paid the travel agency 27,000 yuan. How many employees of this unit have traveled to this scenic spot this time?

Answer:

The first question: suppose that each piece of children's clothing should be reduced by X yuan.

(42-x)(20 2x)= 1200

The solution is x 1= 10 or x2=20.

Question 2: 27000/ 1000=27 people > 25 people.

1000-20(x-25)≥700

x≤40

( 1000-20(x-25))x=27000

The solution is x 1=30 or x2=45.

I only have so much. Acid is a good way. ).