![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 72 71" width="72"></svg>)
Mathematics in grade one, please answer in detail, thank you! (9 10:35:37) If the number a is x and the number a is 3 / 5 of the number B, what is the number B? a and B represent a two digit one digit number and a ten digit number respectively, then why does this two digit number represent? If X-2 | X-2 | = - 1, what is the value range of X
1. A x B 3 / 5 * x
2.10a+b 10b+a
3. [X-2] is an absolute value, which must be greater than 0. Because the result is less than 0, X-2 must be less than zero
x-2
The price of a certain kind of children's clothing is increased by 10% on the basis of the purchase price. It is known that 20% discount is 11 yuan more than 70% discount. How much is the purchase price of this kind of children's clothing?
If the purchase price is x, then the price is 1.1 X
Then the equation 0.8 x 1.1x - 0.7 x 1.1x = 11 yuan
Solution x = 100 yuan, that is, the purchase price is 100 yuan
If xy = - 1, what is the power of (XY) 2008
(xy)^2008=(-1)^2008=1
(xy)^2009=(-1)^2009=-1^2009=-1
RELATED INFORMATIONS
- 1. Given that a is the smallest positive integer, B is the opposite of a, and the absolute value of C is 3, find a + B+ Value of
- 2. When m = what, the value of the quadratic - 5 of the algebraic formula (M + 2) is 20
- 3. Arithmetic problems (18 20:24:23) &#First simplify, then evaluate (T + 3t2-3) - (- t = 42), where t = - 1 2 (2A2 of 3ab-1) + a2 - (3ab-b2), where a = - 2, B = 1
- 4. If the positive integer solution of inequality 3x-k & # 160; ≤ 0 is 1, 2, 3, then the value range of K is--------
- 5. If the lines represented by two equations in the following groups are parallel, what value should a take? (1) 2x + 3Y = a4x + 6y-3 = 0
- 6. Solve equation 1 + 30% x = 21
- 7. (21-x) * 5 / 13 = 13-x how to solve the equation?
- 8. Solve the equation. X + 2 / 11-3 / 11 = 4 / 11 8 / 21-x + 7 / 21 = 10 / 21
- 9. 21 △ x = 2 and 1 / 3 solution
- 10. 5 (X & sup2; - 6x + 9) - 4 = 21 solution equation
- 11. Math factorization in grade one, to complete the process 6, please answer in detail, thank you! (10 15:55:3) a4b4-c4
- 12. When n is what value, the solution of the equation 2x + N3 + 1 = 1 − x2 + n is 0?
- 13. (the sooner the better) (22:18:55:38) 1 The order of rational numbers a, B, C, D on the number axis is D, C, B, 0, A. try to get the exact algebraic formula: (1) a + B / B; (2) B-C / D-B times the sign of ab 2 If a, B, C are rational numbers, and the absolute value of a / A & # 160; the absolute value of B + B + C / C is equal to 1, the absolute value of ABC / ABC is obtained
- 14. Using language to describe meaning The number of Freshmen in a school last year was m, which is 5% higher than last year. What does 5% m mean? (1 + 5%) m mean?
- 15. The volume formula of the ball is the volume of the ball = four-thirds * π * radius of the third power. Two small iron balls with a radius of 5.2cm are melted and multiplied by a large iron ball. It is known that the mass of iron per cubic centimeter is 7.8G, and there is 1% loss in the molten iron. The mass of the molten large iron ball is calculated (π is 3.14, the result is accurate to 1g)
- 16. The oil import volume of an oil importing and exporting country in recent months has decreased by 15% compared with last month. Due to the rise of international oil price, the cost of oil import in this month has increased by 14% compared with last month. How about the growth rate of oil price in this month compared with last month?
- 17. (1) At the same time of selling books in a bookstore, yiaina book rental business is launched. Each book is rented for no more than 3 days, and the daily rent is a yuan. If the rent exceeds 3 days, an additional B yuan will be charged every day from the fourth day. If a book is rented for 7 days, the rent will be --- yuan (2) , a set of 5 real numbers, please calculate the product of the sum of rational numbers and irrational numbers. (accurate to 0.1) [real numbers are: square of 3, half of root sign, cube of root sign 4, cubic of negative 2 (without brackets), negative root sign 8]
- 18. Olympic math problem urgent! 3. My grandfather is no more than 100 years old. My grandfather's age is five times that of my grandson. After a few years, my grandfather's age will be four times that of my grandson. After a few years, my grandfather's age will be three times that of my grandson. Now my grandfather's age is () years old (Updated) (to be added)
- 19. There are 78 chickens and rabbits. There are 121 feet in total. How many chickens? How many rabbits?
- 20. There are three points in the triangle (not on the edge), together with the three vertices of the original triangle, a total of six vertices. With these six vertices, we can make all non overlapping triangles. How many are there?