Similar questions

1. After the Sichuan earthquake, Wuhan City immediately organized medical staff to rush to the Sichuan disaster area to participate in the rescue work of the wounded.

It is planned to send 30 medical staff, carry 20 pieces of luggage (medicines, equipment), rent ***8 cars of two models A and B, and rush to the disaster area day and night. It is understood that each type A car can carry up to 4 people and 3 pieces of luggage, and each type B car can carry up to 2 people and 8 pieces of luggage. (1) Suppose you rent a car of type A, please design all possible car rental plans; (2) If the car rental costs of two types of cars A and B are 8,000 yuan and 6,000 yuan respectively, please choose the most economical car rental. Plan

2. 2. "If one party is in trouble, all parties will support it." In the fight against the "5.12" Wenchuan earthquake disaster, a city organized 20 vehicles to transport ***100 tons of three types of disaster relief materials, including food, medicine, and daily necessities, to the resettlement sites for the victims. According to the plan, 20 cars have to be shipped. Each car can only carry the same kind of disaster relief materials and must be full. Based on the information provided in the table on the right, answer the following questions: (1) Suppose the number of vehicles transporting food is?, and the number of vehicles transporting medicine is

. Find the functional relationship between

and; (2)

If the number of vehicles transporting food is not less than 5, and the number of vehicles transporting medicine is not less than 4,? Then the number of vehicles How many arrangements are there? And write down each arrangement plan; (3) Under the conditions of (2), if the total freight is required to be the least, which arrangement plan should be adopted? And find out Minimum total shipping fee.

3. "Earthquakes have no mercy but no one has feelings." The Civil Affairs Bureau packed the materials donated by the city for the disaster-stricken areas in Sichuan into pieces, including 320 tents and food items, and 80 more tents than food items. (1) How many pieces of tents and food are packed into pieces? (2) It is now planned to rent ***8 trucks A and B to transport all the tents and food to the disaster-stricken areas at one time. It is known that type A trucks can carry up to 40 tents and 10 food items, and type B trucks can carry up to 20 tents and 20 food items each. How many options does the Civil Affairs Bureau have when arranging trucks A and B? Please help design it. ?(3) Under the conditions of question (2), if each type A truck needs to pay a transportation fee of 4,000 yuan, and each type B truck needs to pay a transportation fee of 3,600 yuan. Which option should the Civil Affairs Bureau choose to minimize transportation costs? What is the minimum shipping fee? ?

4 After hearing the shocking news that a strong earthquake occurred in Wenchuan, Sichuan on May 12, the Civil Affairs Bureau of a certain place quickly organized 30 tons of food and 13 tons of clothing for disaster relief materials, preparing to use two types of A and B that night Type A trucks are used to transport them quickly to the disaster area. It is known that each Type A truck can carry 5 tons of food and 1 ton of clothing, and each Type B truck can carry 3 tons of food and 2 tons of clothing. However, due to the rush of time, only 5 tons of food and 1 ton of clothing were recruited. 9 long-distance driver volunteers.?

(1) With 3 drivers driving Category A trucks and 6 drivers driving Category B trucks, can disaster relief materials be transported to the disaster area at one time? ?

(2) In order to transport disaster relief materials to the disaster area at one time, what kind of transportation options are there?