VB problem: expression 32 / 2 - 2 ^ 3 * 9 / 3 Mod 5 / 3?

VB problem: expression 32 / 2 - 2 ^ 3 * 9 / 3 Mod 5 / 3?

32/2=16
2^3*9/3=24
5\3=1
24Mod1=24
16-24=-8
The result should be - 8 if there's no problem

VB operation 13 / 5 mod 4

Among the two operation levels, \ \ is higher than mod, so calculate \, then mod
13-5 means the integral part left by dividing 13 by 5, so it is 2
2mod4 is the remainder of 2 divided by 4, so the answer is 2

If the inequalities x ^ 2-x-2 > 0 and 2x ^ 2 + (5 + 2a) x + 5A are satisfied at the same time

x^2-x-2＞0
(x+1)(x-2)＞0
The solution is: X ＜ - 1 or X ＞ 2
2x^2+(5+2a)x+5a＜0
(2x+5)(x+a)＜0
The solution set is between - 5 / 2 and - A
When - a ＞ - 5 / 2, i.e. a ＜ 5 / 2, the solution set is - 5 / 2 ＜ x ＜ - A
The integer solution is only - 2
So, - 2 < - a ≤ 3
-3≤a＜2
When - a ＜ - 5 / 2, i.e. a ＞ 5 / 2, the solution set is - a ＜ x ＜ - 5 / 2
-2 is not in the solution set
In conclusion, the range of a is - 3 ≤ a < 2

It takes 10 hours for a bus to go from city a to city B, and 15 hours for a truck to go from city B to city A. the two cars leave each other at the same time. When they meet, the bus is 240 kilometers away from city B. how many kilometers are there between city a and city B?

A: the distance between city a and city B is 600 km

The product of (x's square + MX + n) (x's square-4x + 3) does not contain the square of X and the cubic term of X. find m, n

(x²+mx+n)(x²-4x+3)
The product does not contain the square of X and the cubic term of X
So 3 + n-4m = 0
-4+m=0
The solution is m = 4, n = 13

A passenger train from city a to city B runs 60 kilometers per hour. After two hours, a train from city B to city a runs for four hours. At this time, the freight train runs for three minutes
How many kilometers are the two cities apart

Bus goes first: 60 * 2 = 120 (km)
The bus has gone: 120 + 60 * 4 = 360 (km)
Whole course: 360 / (1 / 3) = 1080 (km)

How can 9,8,7,6,5,4,3,2,1 be equal to 22

-9+8+7+6+5+4+3-2x1

A description of the universe, the earth and the moon

The moon is like a loyal guard, always around the earth, sometimes like a mirror, round, bright; sometimes like a sickle, curved, sharp; sometimes like a naughty child, I don't know where to hide. The earth takes her tirelessly to roam in the universe, although the universe is big and dark, they will never get lost

In the lie equation, the difference between one-half of a number and 5 is equal to 1. If a number is increased to 3 times minus 6, 8 will be obtained
The difference between one-half of a number and 5 is equal to 1. If a number is increased to 3 times minus 6, 8 will be obtained

Let a number be X
If the difference between half of a number and 5 is equal to 1, the equation x / 2 - 5 = 1 can be obtained
If a number is increased to 3 times minus 6, 8 is obtained, and the equation 3x - 6 = 8 is obtained

In the experiment of "exploring which factors are related to the size of friction force", the students put forward several conjectures
A the friction force is related to the mass of the object
B the friction force is related to the speed of the object
C the friction force is related to the contact area between objects
D the friction force is related to the roughness of the indirect contact surface
In the experiment, a small horizontal rough long board, a rectangular block (the roughness of each side is the same) and a spring dynamometer are available
Xiao Fang used a spring dynamometer to pull the wood block horizontally and uniformly on the board for three experiments. The experimental data are as follows:
Number of times the speed of wood block movement indicated by spring dynamometer / n
1.8
2 slow 1.8
3.1.8
(1) The conjecture can be verified by the data in the table__ (fill in the serial number). If the control variable method is used in the experiment, attention should be paid to keeping the distance between the wood block and the desktop___ The conclusion can be drawn as follows__________ .
(2) And the above equipment can also verify the conjecture___ (fill in the serial number), the spring dynamometer should be pulled horizontally and uniformly in the experiment, because________ If a long glass plate is provided in the experiment, the conjecture can be verified by using the above equipment____ (fill in serial number)

1) Xiao Fang used a spring dynamometer to pull the wooden block horizontally and uniformly on the desktop for three times. The experimental data are shown in the right figure. The data in the table can verify conjecture B (fill in the serial number). In the experiment, the control variable method is used, so the roughness of the contact surface between the wooden block and the desktop should be kept unchanged