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Integral addition, subtraction, multiplication and division calculation problems and answers, the more the better! Is a calculation problem! Power operation can also be
3、 When x = - 0.2, find the value of the algebraic formula 2x2-3x + 5-7x2 + 3x-5.22. (2x + 3Y) 2 - (2x-y) (2x + y), where x =, y = -. 23. (Y-2) (y2-6y-9) - Y (y2-2y-15), where y = - 2.24. (2a4x2 + 4a3x3
1. (some things can't be typed out and are replaced by words. It's easy to read the formula in the draft book.)
Try to explain that the cubic power of polynomial a, the cubic power of B + the quadratic power of B - 1 / 2a, the quadratic power of B + 0.5A, the cubic power of B - 2A, the cubic power of B + the quadratic power of B + the cubic power of a, the cubic power of B - 4B + 3 has nothing to do with the value of letter A
2. Given the quadratic power of X + the quadratic power of y = 6, xy = - 2, find the quadratic power of the algebraic formula 5x - 3xy-4y - 11xy-7x + the quadratic power of 2Y!
3. About the polynomial of X, the quadratic power of a, the cubic power of X + the quadratic power of 3x - the cubic power of 9x + the quadratic power of X - ax + 9 is a quadratic trinomial, find the value of a!
It's so long. I haven't written a line enough. The first question is 2B quadratic - 4B plus 3. There's no a, so it's irrelevant to take a
A problem of linear inequality of one variable in elementary two
Known equations
2x+y=5m+6
x-2y=-17
The solution X and y of are all positive numbers, and the value range of M is obtained
2x+y=5m+6 ①
x-2y=-17 ②
From (2)
x=17+2y
34+4y+y=5m+6
34-6=5m-5y
28=5(m-y)
5.6=m-y
And ∵ y is a positive number, ∵ Y > 0
m-0＜5.6
m＜5.6
Wrong estimate, hehe
What are the differences in usage among many, much, some and any? Modify countable or uncountable nouns? What are the changes in interrogative or negative forms?
Many modifiers are countable, such as many books
Many modifies uncountable names, such as many water
Any is used in negative and interrogative sentences, some is used in declarative sentences
If a + 23 = B4 = C + 56, and 2a-b + 3C = 21
Let a + 23 = B4 = C + 56 = k, then a = 3K-2, B = 4K, C = 6k-5, so 2 (3K-2) - 4K + 3 (6k-5) = 21, the solution is k = 2, so a = 6-2 = 4, B = 8, C = 7, so a: B: C = 4:8:7
Do the words in a phrase have a role?
For example, all over the word
Yes, in this phrase, all is used as an adverbial, over the world is the center word, and the world is the object of the preposition over
In the triangle ABC, ab = AC, BAC = 90 degrees, any straight line an passing through point a, BD is perpendicular to an and D, CE is perpendicular to an and E, which means de = bd-ce
Determination of congruent triangles
AB = AC, bad = 90 degrees - EAC = ace,
Right triangle abd and CAE congruent,
AD=CE,BD=AE,
DE=AE-AD=BD-CE
What do the Germans say in English
German
Chinese translation of German
German
Adjective a
German; German
2. German
Noun n
1. German
2. German
german
Adjective a
With one's parents; with one's grandparents; with one's grandparents
The area of triangle ABC is 180cm2. Divide the side length AB and BC into two equal parts and three equal parts respectively to find the area of triangle BDE
Is d the midpoint of AB and e the 1 / 3 of BC,
Connecting AE, s △ Abe = s △ ABC / 3 = 60cm ^ 2,
S△BDE=S△ABE/2=30cm^2.
I don't like eggs and meat?
And changed to or
RELATED INFORMATIONS
- 1. An applied problem of a system of linear inequalities in elementary two variables Cement is transported by several 8-ton trucks. If each truck is loaded with 4 tons, then 20 tons of cement is left. If each truck is loaded with 8 tons, then the last truck is not empty. To find out the quantity of cars and cement, we need to list a one yuan inequality system
- 2. Give a box of apples to several children. If each child is given 5 apples, there are 12 apples left. If each child is given 8 apples, the last child gets 8 apples, but there are less than 8 apples. Find the number of children and the number of apples in this box
- 3. Help me solve a problem. It's a system of linear inequalities. Thank you In the equations 2x + y = 1-m and X + 2Y = 2, if the unknown x y satisfies x + Y > 0, the value range of M is obtained? Pay attention to the whole process
- 4. On the system of linear inequalities of one variable 1、 In the system of equations {2x + y = 1-m, if the unknowns X and y satisfy X-Y < 0, then the value range of M is———— x+2y+2 2、 If the solution set of inequality system {x-a ＞ 2 is - 1 ＜ x ＜ 3, then a = -, B=___ x-b＜1 3、 Box 700 pieces of products. If 15 pieces are packed in each box, more than 3 boxes of products can not be packed. If 20 pieces are packed in each box, at least 8 boxes are left. Calculate the number of boxes. (the solution of the formula) 4、 Given that the solution X and y of the system {2x + y = 5m + 6 are all positive numbers, the value range of M is obtained. x-2y=17
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- 9. In order to expand sales, increase profits, and reduce inventory, the mall decided to take appropriate price reduction measures. During the trial period, it was found that when the price of each commodity decreased by 1 yuan, the mall could sell 2 more per day. According to this rule, if the mall wants to make a profit of 1200 yuan per day, how much should the price of each commodity be reduced ？
- 10. There are 100 peach trees in an orchard, each of which bears 1000 peaches on average. Now we are preparing to increase the yield by planting more than one tree. Without planting more than one tree, the yield of each tree will be reduced by 2. However, the number of peach trees should not exceed 100. If we want to increase the yield by 15.2%, how many trees should be planted? My method is to set up multiple x trees and get (100 + x) (1000x-2x) = 100000 (1 + 15.2%) Look at how wrong I am. If it's right, help me figure it out. If it's wrong, help me change it! How do you solve the equation
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- 16. There are 50 problems in the operation of rational numbers, 50 problems in solving equations, and 30 problems in simplifying evaluation,
- 17. Application problem: quadratic equation of two variables A shop decoration, if a, B two Decoration Group Construction at the same time, 8 days can be completed, need to pay two groups of 3520 yuan; if first ask a group to do alone for 6 days, and then ask B to do 12 days can be completed, need to pay two groups of fees, a total of 3480 yuan?
- 18. Solving the application problem of binary linear equation There is only one car for a class to go for an outing in Beishan Mountain 18 kilometers away, which is divided into two groups. Group A takes the car first, group B walks, and the car goes to A. group A gets off the car and walks, and the car returns to group B. the last two groups arrive at Beishan Mountain at the same time. The known speed of the car is 60 km / h, and the walking speed is 4 km / h? Please set two unknowns
- 19. Elementary two's one variable one degree inequality application question A rectangular plot is 8 meters wide and less than 50 meters in circumference, with an area of at least 120 meters square Find the value range of the length of the rectangle
- 20. On the system of linear inequalities of one variable in the second grade of junior high school mathematics Give a basket of oranges to several children. If each child gets 4 oranges, there will be 9 oranges left. If each child gets 6 oranges, the last child gets less than 3 oranges. How many oranges are there?