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The amount of oil consumed by eating a bag of fried instant noodles is as high as 30g, which is the upper limit of the amount of oil consumed by no one every day
Eating a packet of fried instant noodles intake of up to 30 grams of oil, which is per capita daily intake of oil limit
This is the question of Chongqing senior high school entrance examination last year. There are no mistakes
It costs 25 yuan to buy 10 bags of instant noodles and 5 bottles of mineral water in the supermarket. The second time, it costs 29 yuan to buy the same 7 bags of instant noodles and 15 bottles of mineral water
Q: what's the price of each bag of instant noodles and bottle of mineral water,
2 yuan per bag of instant noodles and 1 yuan per bottle of mineral water
Hope to help you.
Would you like to make noodles with mineral water?
Pure water can. But mineral water can't. mineral water also has trace calcification. Emulsions. High heat or long storage time may cause the deterioration of these trace elements
Two teachers of a school planned to take some students to travel, contacted two tourism companies with the same price, and the full ticket was 100 yuan
After negotiation, the preferential condition of company a is that one teacher will be charged in full, and the rest of the teachers and students will be charged at a discount of 7.5%. The preferential condition of company B is that all the teachers and students will be charged at a discount of 8%. When the number of students exceeds, is the price of company a more favorable than that of company B?
Which company is more favorable
(1) If the number of students is x, Party A and Party B charge the same. In this case, company a charges 75 (x + 1) + 100; company B charges 80x
Then 75 (x + 1) + 100 = 80x
x=35
When x = 30 (i.e. the number of students is 30), company a charges 2425 yuan and company B charges 2400 yuan, so company B is more preferential than company a when the number of students is less than 35; when the number of students is equal to 35, the two companies are the same; when the number of students is more than 35, the price of company a is more preferential than company B
(2) If you set up a travel teacher and student to go to x people together, the two families will have the same discount. X-2 is the number of students. 7.50% discount means to go to one. The equation 75 (x-1) + 100 = 80x gives x = 5. The answer is: when the number of students exceeds 3, a is better than B. sorry, I won't get the number axis up. If I draw a number axis, it will come out
Five teachers led a number of students to travel (unified payment of travel expenses). They contacted two travel agencies with the same price. After negotiation, the preferential terms of hotel a are as follows:
The preferential conditions of B travel agency are: all teachers and students pay 20% off. Q: 1. When the number of students is the same, the two travel agencies charge the same. 2. Set the number of students as y, the charge of a company is ya, and the charge of B company is Yb. Calculate the charge of the two companies (just write the expression)
The unit price is 80 yuan
Question 1: set the price for 15 teachers and some students, set the number of students as y. a travel agency: students are given a 70% discount, so: total price = 5 + 0.7yb travel agency: students and teachers are charged with a 20% discount, so: total price = 0.8 (5 + y), so when 5 + 0.7y = 0.8 (5 + y), so 5 + 0.7y = 4 + 0.8y
One weekend, Mr. Wang and other three teachers led several students Math problem! Be quick!
A travel company talks about that the discount given by company a is for teachers to pay for everything, and the discount given by company B is for students to pay for everything. Which company can save money? One yuan one time equation! Urgent!
There are X students, and the cost of each student is n
Total cost of the first option - total cost of the second option
3n+0.75xn-0.8*(x+3)n
=0.6n-0.05xn
When the cost of two schemes is equal
0.6n-0.05xn = 0 shows that the cost comparison has nothing to do with the value of n
0.6-0.05x = 0, then x = 12
That is, when the number of students is 12, the cost of the two schemes is equal
The first scheme can save money when there are more than 12 students
When there are less than 12 students, the second scheme saves money
A school organized teachers to travel to Guilin. A travel agency said, "if you buy a full ticket, the rest of you will enjoy half price discount." B travel agency said, "all of you will get a 60% discount on the full ticket price." if the full ticket price is 1780 yuan, set the number of teachers as X, the charge of a travel agency is y a, and the charge of B travel agency is y B. calculate the charges of the two travel agencies respectively. (expressed by algebraic formula)
If the total ticket price is 1780 yuan, set the number of teachers as X, the charge of travel agency a is y a, and that of travel agency B is y B. calculate the charge of the two travel agencies respectively (expressed by algebraic formula y a = 1780 + 1780 / 2 * (x-1) y B = 1780 * 0.6 * x)
Mr. Zhang led the seventh grade "three good students" to carry out summer camp activities. Travel agency a said, "if the teacher buys a full ticket, the students can enjoy half price discount." travel agency B said, "including the teacher, there is a 60% discount on the full ticket price." if the full ticket price is 240 yuan, when the number of students is how many, the two travel agencies charge the same amount?
Suppose the number of students is x, according to the meaning of the question: 240 + 120x = 0.6 × 240 (x + 1) 240 + 120x = 144 + 144x240-144 = 144x-120x24x = 96, the solution is: x = 4, so when the number of students is 4, the charges of the two travel agencies are the same
During the Dragon Boat Festival, Xiao Ming, Xiao Liang and other students go to Taishan with their families. It is known that the ticket price is 35 yuan for an adult, 50% discount for students, and 60% discount for group tickets for more than 16 people (including 16 people), It's 350 yuan in total. Xiaoming: Dad, let me calculate. Is it cheaper to buy tickets in another way? How many students? (2) Please help Xiao Ming figure out which way to buy tickets is more economical? And why?
(1) Let x adults go, according to the meaning of the question, the equation is 35x + 35 × 12 (12-x) = 350, the solution is x = 8, the number of students is 12-8 = 4. (2) if you buy a group ticket, you need to spend 16 × 35 × 60% = 336 (yuan), because 336 < 350, so you can save more money
During May Day, Xiao Ming, Xiao Liang and other students went to a park with their parents. Here is a dialogue between Xiao Ming and his father when buying tickets
Dad: "adult tickets are 35 yuan each, student tickets are 50% discount, we have a total of 16 people, a total of 350 yuan."
Xiao Ming: "Dad, let me calculate whether buying tickets in another way can save money."
Ticket price: adult: 35 yuan per ticket, 50% discount for students, 60% discount for group tickets (16 or more)
(1) Xiao Ming, how many adults and students did they go to?
(2) Please help Xiao Ming figure out which way to buy tickets is more economical? Explain the reason
Bivariate linear equation, note that it is a bivariate linear equation
Let's go to x adults, (12-x) students. 35x + 0.5 × 35 (12-x) = 350 35x + 17.5 (12-x) = 350 35x + 210-17.5x = 350 17.5x = 140 x = 812-8 = 4 people. A: 8 adults, 4 students
RELATED INFORMATIONS
- 1. During May Day, Xiao Ming, Xiao Liang and other students went to a park with their parents; During the May Day holiday, Xiao Ming, Xiao Liang and other students went to a park with their parents. The following is a dialogue between Xiao Ming and his father when they bought tickets. According to the information, how many adults and students did Xiao Ming go to? (2) please help Xiao Ming figure out which way to buy tickets is more economical? Explain the reason Ticket Price Adult: 35 yuan each Student: 50% discount for adults Group ticket [more than 16 persons including 16 persons]: 60% discount for adults Adult tickets are 35 yuan each, student tickets are 50% discount. We have 18 people, a total of 525 yuan [calculation process. Formula] emergency
- 2. The ticket price of group buying park tickets is as follows: the number of people buying tickets is 1-5051-100100, and the ticket price per person is 13119. There are two tour groups A and B. It is known that the number of people in group A is less than 50, and the number of people in group B is not more than 100. If they buy tickets separately, the total ticket fee payable is 1392 yuan. If they buy tickets together as a group, the total ticket fee payable is 1080 yuan (2) how many people are there in each group?
- 3. A certain engineering team needs to recruit 150 workers of both types of work. The monthly salary of workers of both types of work is 800 yuan / person and 1200 yuan / person respectively. Now the number of workers of type B is required to be no less than twice of that of type A. Q: how many workers of both types of work can make the minimum monthly salary and the minimum total salary
- 4. Check in of a tour group A tour group to a hotel accommodation, a total of 18 rooms, each 200 yuan per day, the tour group leader asked for group discounts, the hotel manager said: "from the first room, respectively charge 2 yuan, 4 yuan, 8 yuan, 16 yuan Until the 18th room, is that ok? "The head of the tour agreed with a smile, but he was silly when he checked out the next day. Can you figure out how much the tour group should pay? Did you get a discount?
- 5. Park ticket prices are set out in the table below Number of tickets purchased: 1-50, 51-100, more than 100 Price of each ticket: 13 yuan, 11 yuan, 9 yuan A total of 104 students from seven (1) and two (2) classes of a school went to visit the park, of which the number of students in class (1) was less than 50 ① How much money can be saved if the two classes unite to buy tickets as a group? ② How many students are there in each class? ③ If class 7 (1) organizes a tour to the park alone, how can you save money by buying tickets
- 6. How many milliliters of water can the cap of a bottle of Master Kang's mineral water hold? (I want to drink 15 milliliters of medicine, for accuracy!)
- 7. A bottle of mineral water is about 500 (); a bottle of eye drops is about 10 (); the volume of freight container is about 5 ()
- 8. What is the nature of cola, orange water, mineral water and salt water? Acid, neutral or basic?
- 9. The weight of a watermelon is equal to the weight of three pineapples, the weight of two pineapples is equal to the weight of eight apples, and the weight of two oranges is equal to the weight of one apple Q: how many oranges does a watermelon weigh?
- 10. On Sunday, students take bread, eggs, cooking utensils and other food to spring outing?
- 11. The students had a picnic in groups. They divided 42 bottles of coke and 30 bottles of yoghurt equally to each group. Just think about how many groups they were divided into at most. Each group was given several bottles of two kinds of drinks
- 12. The admission fee of the park is 30 yuan per student. There are two kinds of preferential schemes. Scheme A: leading teachers are free When m is the same, the two schemes charge the same
- 13. There are peach trees, apple trees and pear trees in the orchard. The ratio of peach trees to apple trees is 4:5, and that of apple trees to pear trees is 3:2, Fast
- 14. In the orchard, pear trees account for 25% of the total, apple trees account for 120, which is just 5 / 9 of the total, and the rest are peach trees, How many peach trees and pear trees are there?
- 15. There are 150 fruit trees in the orchard. The ratio of apple trees to peach trees is 3:2, and that of peach trees to pear trees is 4:5. How many trees are there in each of the three trees?
- 16. There are 108 pear trees and apple trees in the orchard. The number of pear trees is three times that of apple trees. How many apple trees are there
- 17. Rewrite the following equation as 12 * 2 = 3 * 8 1.5 * 12 = 20 * 0.9
- 18. How many centimeters is 9 decimeters minus 14 centimeters
- 19. What is 29 out of 4 minus 3 Such as the title
- 20. What is the least common multiple of 8 and 10 and 6 emergency