Who can help me solve the math problem Write the numbers that meet the requirements with 2, 7, 4, 5 and five zeros (1) The largest nine digits (2) The smallest nine digits of seven in a million (3) Read only a nine digit zero

"Sly980926" Hello, I'm glad to answer for you! There's a mistake upstairs, why there are many zeros at the end? Please refer to my: (1) if the largest nine digits are composed, then the number must be the largest. So the largest nine digits are 777. (2) if the smallest nine digits are composed of one million digits, then try to use 0 as much as possible

Mathematics.. it is known that x = 9 is the equation | 1 / 3 X-2 | = B, find the value of B. when x = 1, ask for the solution of the equation

Take x = 9 into | 1 / 3 X-2 | B
|1x9-2 | = b
|3-2|=b
b=1
When x = 1, B = | 1 / 3-2 | = 5 / 3

If a and B are reciprocal to each other, m and N are opposite to each other, and the opposite number of C is equal to 2, find the square of (M + n) divided by the cube of AB + (ABC)

ab=1
m+n=0
c=-2
(m+n)^2/ab+(abc)^3
=0+(-2)^3
=-2^3=-8

1. It takes 16 hours for team a to complete a project alone and 24 hours for team B to complete it alone. Now team B will work for 5 hours first, and then the two teams will work together to finish 2 / 8 of the whole project in a few more hours
2. A and B both start from a to B. A walks while B rides a bicycle. If a starts 6km before B starts, B will arrive at B at the same time with a after 2 / 3 hours. If a starts 1 / 1 / 2 hours, B can catch up with a in 1 hour. Find the distance between a and B
1 / 2 / 2 is 1 and 2 / 2

The first question: team a can do 1 / 16 of the total project in one hour, and team B can do 1 / 24. If it takes x hours to design, then 5 / 24 + (1 / 16 + 1 / 24) * x = 2 / 8, calculated, x = 0.4 hours. The second question: which 1 / 1 / 2H is 1.5 hours? If the speed of team a is x, and the speed of team B is y, then 6 + 2 / 3 * x = 2 / 3 * y (1.5 + 1) * x = 1 * y

After the price of a dress is reduced by 13, it is increased by 13. The final price of this dress is the original price______ ．

1 × (1-13) × (1 + 13), = 1 × 23 × 43, = 89; a: the final price of this dress is 89% of the original price

Biologists found that the length of a virus is about 0.000043 mm, which should be 0.000043 mm by scientific notation______ ．

000 043 = 4.3 × 10-5, so the answer is: 4.3 × 10-5

If a person starts from point a, walks 100 meters along 60 ° north by east to point B, then starts from point B, walks 200 meters along 15 ° south by west to point C, then ∠ ABC is equal to (?)
A.45° B.75° C.105° D.135°
It must be right

It is known that the area of the trapezoid is 60 square meters, and the top and bottom are 5 cm. The diagonal of the trapezoid divides it into two triangles, and the area ratio is 1:2?

The diagonal of the trapezoid divides it into two triangles with an area ratio of 1:2
Because the heights of the two triangles are equal, they are both trapezoidal
Therefore, the ratio of the upper bottom to the lower bottom is 1:2
Bottom = 10
S=(5+10)h/2=60
H = 8 (m)

|10/11-11/12|+|11/12-12/13|+|12/13-13/14|+… +|What is 98 / 99-99 / 100

=11/12-10/11+12/13-11/12+.+99/100-98/100
=99/100-10/11
=89/1100

A few questions on filling in the blanks in the first semester of grade seven
1.Let's___ (have)a speech contest.
2.Do you konw Edison's_ ?(birth)
3. you__ (have)an English party?

1、have 2、birthday 3、Do have

Who can help me solve the math problem Write the numbers that meet the requirements with 2, 7, 4, 5 and five zeros (1) The largest nine digits (2) The smallest nine digits of seven in a million (3) Read only a nine digit zero