2 / 3 × [3 / 2 × (quarter x) - 4 / 2] - 2 = what is x equal to,

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• 1. What is the square of 12 + a?
• 2. How many meters is 12 square meters? Such as the title
• 3. How many meters is 12 square meters
• 4. What's the square of 12
• 5. Given the square of a + the square of B = 25, ab = 12, find a + B
• 6. 12 square decimeters equals () square meters
• 7. 9-1 = 8 × 1,25-9 = 8 × 2,49-25 = 8 × 3,81-49 = 8 × 4 ·· these equations reflect the law of natural numbers. Let n denote the equation of natural numbers with n
• 8. Observe the following equations: 9-1 = 8, 16-4 = 12, 25-9 = 16, 36-16 = 20 Let n be a positive integer. The following equation is () A. （n+2）2-n2=4（n+1）B. （n+1）2-（n-1）2=4nC. （n+2）2-n2=4n+1D. （n+2）2-n2=2（n+1）
• 9. Observe the following equation: 9 × 0 + 1 = 19 × 1 + 2 = 119 × 2 + 3 = 219 × 3 + 4 = 319 × 4 + 5 = 41 According to the law reflected in the number table, we guess that the nth equation (n is a positive integer) should be () A. 9（n-1）+n=10（n-1）+1B. 9n+n=（n-1）+1C. 9n+（n-1）=n2-1D. 9n+n+1=10n+1
• 10. 9×0+1＝1 9×1+2＝11 9×2+3＝21 9×3+4＝31 9×4+5＝41 … guess 9×0+1＝1 9×1+2＝11 9×2+3＝21 9×3+4＝31 9×4+5＝41 … Guess: what can the nth formula (n is a positive integer) be expressed by N?
• 11. 4.2 to 1 is a quarter to eight to five
• 12. One two fourths equals four four eighths equals six sixths, right? Please correct? How do you understand this? Please explain the basic principle and its formula?
• 13. 2 / 1: x = 4 / 1:10 / 1 is 2:1: x = 4:1:10:1 how to calculate? How much is it equal to?
• 14. Is the inverse theorem that the central line on the hypotenuse of a right triangle is equal to half of the hypotenuse true? How do you prove it,
• 15. 1: Write "equal to vertex angle" as "if. Then." form 2: is there an inverse theorem for theorem "equal to vertex angle"? No counterexample is given
• 16. Take a counter example to show that "the median line of a triangle is equal to half of its three sides" has no inverse theorem Have a picture. I'll wait! It's best in 10 minutes. Maybe you can give me some ideas
• 17. I want to write a program, the program to randomly allocate five numbers, the five numbers must add up to 100. What is the calculation principle?
• 18. What is the theorem / conjecture that the cube of any natural number a is equal to the sum of a continuous odd numbers? I want to know its name Has any textbook mentioned this theorem If yes, please tell me the publishing house, grade and page number
• 19. What does it mean that my parents' birthdays add up to my birthday? Mom 0815 + dad 0216 = me 1031 What's the point of coincidence?
• 20. The second power of 3 - the second power of 1 = 8 = 8X1, the square of 5 - the square of 3 = 16 = 8x2?