The speed ratio of the two vehicles is 3:4. After 5 / 4 hours, the two vehicles meet. The distance ratio of the two vehicles is (): ()

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• 1. The price of 20 kg apple and 30 kg pear is 132 yuan. The price of 4 kg apple is equal to that of 5 kg pear Please write down the process Just one unknown X Please use the method of the first volume of the fifth grade
• 2. There are two piles of mud. Originally, the mass of cement in pile a is 5 / 7 of that in pile B. now, 12 tons of cement are transported from pile B to pile A. at this time, the mass of cement in pile a is 7.8% How many tons of cement are there in a and B piles
• 3. Real numbers a, B, C, D, satisfy, d > C, a + B = C + D, a + D
• 4. If a √ a + B √ B ＞ a √ B + B √ a, then the condition that real number a B should satisfy is
• 5. Let a and B be two real numbers. The following conditions are given 1.a+b=2 2.a+b>2 3.a+b=2 4.a^+b^>2 5.ab>1 If at least one real number of a and B is greater than 1
• 6. Let a, B, C ∈ positive real number, a + B + C = 7, then the maximum value of √ a + √ B + √ C is
• 7. a. B and C are positive real numbers, which are not equal to each other and ABC = 1
• 8. As shown in the figure, the real numbers corresponding to two points a and B on the number axis are 1 and 3 respectively. If the symmetric point of point a about point B is point C, then the real number corresponding to point C is______ ．
• 9. The corresponding points of real numbers a, B and C on the number axis are shown in the figure —————_ 4——_ 3—— _ 2—— _ 1 ——O——1——2——3——4——5——— A is between minus 4 and minus 3, B is between minus 1 and minus 2, and C is between two and three Simplification: | A-B | - | C-A | + | B-C|
• 10. It is known that a, B and C denote the side length of △ ABC, m ＞ 0. Proof: AA + m + BB + m ＞ CC + M
• 11. There are two cargo ships. The cargo carrying capacity of ship a is 25% more than that of ship B. ship a and ship B carry 1800 tons of cargo in total. What are the cargo carrying capacity of ship a and ship B? (use the equation to solve the problem.)
• 12. Some coal has been transported by Party A alone for six times and Party B alone for five times. Now Party A has transported three times and Party B has transported two times, with a total of 18 tons. How many tons in total?
• 13. As shown in the figure, in the quadrilateral ABCD, ab = BC, BF is the bisector of ∠ ABC, AF ‖ DC connects AC and CF
• 14. A and B two cars from East and west at the same time, the distance ratio is 5:3 when they meet. At this time, B car is 80 kilometers away from the center of the two places How many kilometers are there between the East and the west?
• 15. Find the square of all numbers 11-24
• 16. It takes 15 hours for a car to go from place a to place B, and 12 hours to return. The speed of return is increased by () a.1/4 b.1/5 C.1 / 6
• 17. What are the average and variance of a set of data 1.2.3.4.5?
• 18. The two trains a and B leave each other from the two cities at the same time. When car a travels 36 kilometers less than car B, the two trains are 264 kilometers apart. Given that the speed ratio of car a and B is 5:6, how many kilometers are the two cities apart
• 19. Points a and B represent real numbers a and B respectively on the number axis. The distance between two points of a and B is expressed as ∣ ab ∣. Then | ab | = | b-a| (1) If two points a and B on the number axis represent real numbers x and - √ 2 respectively, and ab = 3, find the value of X (2) If the three points P, a and B on the number axis represent real numbers x, - 2 and √ 3 respectively, the value range of X is obtained when the algebraic formula | x + √ 2 | + | X - √ 3 | takes the minimum value
• 20. A and B two cars from AB two places to each other, 60 kilometers away from a first meet, each arrived at the other party's starting point, immediately return on the way and 40 kilometers away from a meet How many kilometers are ab apart