How about one third cube That's 123 out of 321 cubes

How about one third cube That's 123 out of 321 cubes

Molecule: cube of 1 = 1
Denominator: cube of 3 = 27
So, 1 / 3 cube = 1 / 27

We know the value of X-1 / x = 2, X-cube - (1 / X-cube) + (2 / x) - 2x

x-1/x=2
x-1=2x
The solution is x = - 1
Then substitute x = - 1 into the second formula
We get - 1 - (- 1) + (- 2) + 2 = 0

Find the cube of 8-27 (x-1) = 0

Cube of 8-27 (x-1) = 0
Cube of (x-1) = 8 / 27
x-1=2/3
x=5/3

If a and B are all non-zero rational numbers, what is the value of (A / | a |) + (B / | B |) + (| ab | + | ab |)?

a＞0,b＞0,（a/|a|）+（b/|b|）+（|ab|+|ab|）=1+1+2ab=2＋2aba＞0,b＜0,(a/|a|）+（b/|b|）+（|ab|+|ab)=1-1-2ab=-2aba＜0,b＞0,（a/|a|）+（b/|b|）+（|ab|+|ab|）=-1+1-2ab=-2aba＜0,b＜0,（a/|a|）+（b/|b|）+（...

(1) Grandma Zhao bought 6 pairs of socks from the supermarket, 3.8 yuan for each pair. The salesperson gave her 27.2 yuan. How much did grandma Zhao pay the salesperson?
(2) There are 85 white and black shirts in the store. The number of white shirts is four times that of black shirts. How many black shirts do the store ship?
(3) Party A and Party B drive westward at the same time from the East and the West with a distance of 48 kilometers. Party A's car travels 12 kilometers per hour, and Party B's walk 4 kilometers per hour. After a few hours, Party A can catch up with Party B? (the last one can be done without equation)

1. Suppose X Yuan x-27.2 = 6 * 3.8 x = 50 yuan
2. Suppose x black shirts 4x + x = 85 5x = 85 x = 17
3. It takes x hours to set A. 12x = 48 + 4 * x 8x = 48 x = 6 hours

As shown in Figure 1, there are two squares, one big and the other small. The distance between the corresponding sides is 1 cm. If the area between the two squares is 12 square centimeters, what is the area of the big square?

(12-1 × 1 × 4) △ 4 △ 1 = (12-4) △ 4 △ 1 = 8 △ 4 △ 1 = 2 (CM) 2 × 2 + 12 = 4 + 12 = 16 (square cm) a: the area of a large square is 16 square cm

When the electromagnetic wave is emitted from the moon to the earth, it can reach the earth after 1.28s, then the distance between the earth and the moon is about 10______ km．

The distance of electromagnetic wave s = CT = 3.0 × 108m / s × 1.28s = 3.84 × 108m = 3.84 × 105km

On the physics of acoustics
1. The car drove to the opposite cliff at the speed of 15mgs, whistling somewhere away from the cliff. After 4S, the driver heard the recovery, and asked the distance between the car and the cliff when the whistling?
2. A train runs at a speed of 20m / s on a straight road at a constant speed. Two seconds after the train whistle, it hears the sound reflected by the obstacles on the front rail. At this time, the driver stops immediately and tries to find out how far away the parking place is from the obstacles? (at this time, the temperature is 15 ℃)
No other factors are taken into account

1: V car * t = s car = 4 * 15 = 60mV sound * t sound = s sound = 340 * 4 = 1360ms Car + s sound = 2S total = 60 + 1360 = 1420m2s / 2 = s = 1420 / 2 = 710m2: V car * t = s car = 2 * 20 = 40mv sound * t sound = s sound = 340 * 2 = 680ms Car + s sound = 2S total = 680 + 40 = 720m2s / 2 = s = 720 / 2 = 360m360-40 = 320m

Using a piece of rectangular paper 20 cm long and 10 cm wide, roll it into a cylinder. (1) when the height is 10 cm, what is the maximum perimeter of the bottom
Use a piece of rectangular paper 20cm in length and 10cm in width to form a cylinder. (1) when the height is 10cm, what is the maximum perimeter of the bottom?

20 cm, the circumference of the bottom is the length of the rectangular paper

Simple formula of 1 + 2 + 3 + 4 + 5 + 6 +... 100

1+99
2+98
3+97
4+96
.
five thousand and fifty