How to convert the area of ceramic tile into weight

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• 9. 1. The rules of points in football match: in order to win one game, get 3 points, draw one game, lose one game, get 0 points. A football team needs to play 14 games in a certain season, now it has played 8 games, lost one game, get 17 points (1) How many games did this team win in the first eight games? (2) How many points can a player score in 14 games? (3) Through the analysis of the game situation, this team has played 14 games. If the score is not less than 29 points, it can achieve the expected goal. Please analyze how many games this team has to win in the next six games to achieve the expected goal? 2. The distance between station a and station B is 450km; a slow train from station a runs 65km per hour; an express train from station B runs 85km per hour (1) How many hours will the two cars meet each other? (2) The express train will drive for 30 minutes first, and the two trains will face each other. How many kilometers will the slow train run? How many kilometers will the two trains meet? The express train will drive for 30 minutes first, and the two trains will face each other. How many hours will the slow train run?
• 10. The original price of a washing machine is 1450 yuan. Now it is sold at a 20% discount, but the price is still higher than the cost. 19. How much is the cost of this washing machine?
• 11. If the square of M + M-1 = 0, then the cubic power of M + 2 times the square of m-2001 =?
• 12. The cubic power of a minus the square of a times the square of B = 2, the square of a times the square of B - the cubic power of B = 5, find the cubic power of a - the cubic power of B
• 13. If AB is opposite to each other, AC is reciprocal to each other, and the power of x = 4, find the power of - 3A + ac-3b + (A / b) of X to the power of 2014
• 14. If a and B are opposite to each other, a and C are reciprocal to each other, and the square of x = 4, find the value of 3A + 3B + AB / x + ([B / a) to the 101st power]
• 15. If AB is opposite to each other, AC is reciprocal to each other, and the square of X is equal to four, find the square of x minus 3A + ab-3b of X + B of a to the power of 2007 Trouble! Hurry
• 16. Given that a and B are opposite to each other, C and D are reciprocal to each other, LXL = 2, try to find the square of X - (a + B + CD) x + (a + b) to the power of 2012 + (- CD) to the power of 2011
• 17. Given that a and B are opposite to each other, C and D are reciprocal to each other, | x | = 10, find the value of 2011 power of formula (CD) * x square + (a + b) emergency
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• 20. Factorization: (x + 1) (x + 2) (x + 3) (x + 4) + 100 There is this question on the Internet... I asked it just because I thought it couldn't be 100, so I couldn't figure it out