It is known that the sum of 2x ^ (M + 5) y ^ 2 and x ^ 3Y ^ n is a monomial, just m ^ n=

It is known that the sum of 2x ^ (M + 5) y ^ 2 and x ^ 3Y ^ n is a monomial, just m ^ n=

According to the meaning of the title: M + 5 = 3
n=2
∴m=-2
n=2
∴m*n=（-2）²=4

If a monomial minus X-Y equals x + y, then the monomial is () a.2x b.2y
If X-Y minus X-Y equals x + y, then the monomial is ()
A.2x B.2y C.-2x D.-2y

A

It is known that 2x ^ 2Y ^ B + 1 + (A-1) x ^ 2 is a quartic monomial about X, Y. find the value of a, B

2X ^ 2Y ^ B + 1 + (A-1) x ^ 2 is a quaternion of X, y
a-1=0
a=1
2+b+1=4
b=1

Known a column number: 1 / 3, 2 / 5, 3 / 7, 4 / 9... According to the arrangement of the column number, what is the nth number? Note: n is a positive integer
See that day, urgent

n/2n+1

How to find the sum of all mutually opposite integers whose absolute value is less than 2008

As you know, the requirement is the sum of the opposite integers whose absolute value is less than 2008
1 and (- 1) are mutually opposite integers less than 2008. Since they are 2008, there are 2008 integers
The opposite number
Since it is an opposite number, and the sum of the opposite numbers is 0
Then sum is 0

Mathematics, geometry, kneeling for solutions
In quadrilateral ABCD, efgh is the midpoint of AB BD CD AC. what condition is added to make fegh diamond
Draw your own graphics
Say why. Proof process
Help me

AD＝BC
Connect AD and BC diagonals
According to the theorem of triangle median line,
EH//BC,FG//BC,EH=(1/2)BC,FG=(1/2)BC
EF//AD,GH//AD,EF=(1/2)AD,GH=(1/2)AD
So efgh is a parallelogram
When BC = ad, eh = FG = EF = GH becomes a diamond

There are three kinds of balls in the box. The ratio of the number of yellow balls to the number of red balls is 2:3, and the ratio of the number of red balls to the number of white balls is 4:5
How many red balls are there?
2:3=8:12 4:5=12:15
350÷（8+12+15）=350÷35=10
12x10 = 120
Is that right

Your answer is correct

How many inches is one centimeter

1cm = 1cm = 1cm, one inch = 0.0254m = 2.54cm, one foot = 30.48cm, so 1cm is 0.3937 inch

The sector chart is used for statistical analysis______ Represents the total number, represented by each sector in the circle______ ．

The area of a circle in a sector chart represents the total number and the area of a sector represents the partial number

··Mathematics application problem! Master help me! Speed! Request to write arithmetic!
For a suit, the price ratio of pants to top is 4:6, and the top is 50 yuan more expensive than the pants. How much are the prices of the top and pants?

The price ratio of trousers to coat is 4:6,
There is a difference of 2 copies. The price of each copy is: 50 / (6-4) = 25 yuan
Pants are 4: 25x4 = 100 yuan
The top is 6: 25x6 = 150 yuan