If the master answers well, I will add points

Answer: Solution: (1) If this batch of materials has a total of x tons, then.

Shipped by N cars weighing 5 tons, there will be 21 tons of materials left: x = 5n + 21, and by N cars weighing 8 tons, then (n-1) cars are fully loaded, and the last car is not empty, but the materials contained are less than 5 tons

0 x-8(n-1) 5, substituting x=5n+21 into the inequality yields:

0 5n+21-8(n-1) 5,8 n 29 3 so n=9,x=66

2) Set the use of 5 tons and 8 tons of vehicles Y and Z, then.

It is transported by two types of vehicles with a load capacity of 5 tons and 8 tons at the same time, so that each car is fully loaded and the number of vehicles required is minimal

y+z 9,5y+8z=66, the solution obtains: {y=2,z=7 Therefore, 2 vehicles with a load capacity of 5 tons and 7 vehicles with a load capacity of 8 tons are used at the same time for transportation, each car is fully loaded, and the number of vehicles required is the least

A total of 66 tons of supplies.

7 x 8-ton cars, 2 x 5-ton cars.

Suppose there are x tons of cargo, and there is b tons of surplus when loading with an 8-ton car: x=5n+21x=8(n-1)+b

We get 3n=29-b, and b is less than 5, and n is an integer, so there is only one solution: b=2, n=9, and x=66.

With 2 5-ton cars and 7 8-ton cars, the vehicles are used least and both are fully loaded.

÷ 5/6=960

2. Length + width = 84 2 = 42

Length = 42x4 7 = 24, width = 42x3 7 = 18 area = 24x18 = 432

3. Length = 6x3 2 = 9, circumference = (9 + 6) x 11 (1 + 1 11) = 1 125, the question is incomplete.

Question 1: Find unit one first, the front of the ratio is unit one, and unit one is unknown, so use division, use the corresponding measure to get the corresponding fraction: 800 divided by 5/6 = 960 yuan Answer: 960 yuan for the sixth grade.

Moisture 200 times protein 200* fat 200* carbohydrate 200*

Wow, you're too lazy, just multiply 200 by a percentage.

Four-thirds meters are two-thirds more than two-thirds meters, and zero meters are two-thirds less than two-thirds meters;

Three-fifths of a number is 150The reciprocal of this number is 1/250, and the simplest integer ratio is 6:5, the ratio is 6:5, and the ratio is 6/5, which is equivalent to 40% of the total number of girls, and 150% of the total number of girls for boys, and the circumference is centimeters, and the area is increased by square centimeters.

Girls are equivalent to four out of seven boys.

36 should be added to the latter item

The ratio is 5:9

Suppose after reading 20 pages, the number of unread pages is x, then what has been read is 3x, then before reading these 30 pages, the number of unread pages is x+20, and the number of pages read is 3x-20, according to that ratio, the formula is obtained: (3x-20):(x+20)=1:

4. The solution is x = 11/100, not an integer.

Four-thirds.

One in two hundred and fifty.

Six to five.

36PAI400 four-sevenths.

The Clutches of the Devil (1999).

Director: Rodman Flender

Screenwriter: Terri Hughes Ron Milbauer Starring: Vivica Fox, Jessica Alba, Elden Hansen, Devon Sava Seth Green.

Genre: Comedy, Thriller, Horror.

Country of Production: Region: United States.

Language: English.

Release: 1999-04-30

Runtime: 90 minutes 92 minutes (Argentina) aka: Idle Hands.

Set up your wireless router first, plug it in, then use your laptop to search for the wireless router and connect it (if that doesn't work, you can also use a network cable to connect your computer to the router). Then open the browser, enter the IP address of the router in the address bar (there is on the back of your router), generally or, and then enter the username and password (generally admin, note that it is not a broadband account and password), and then select the networking mode, select the PPPoe mode, enter your broadband account password, and then set the wireless password, and then click Save.

Note that the whole process is not networked, if there is a red font prompt (such as no connection to the WAN port), ignore it, and set it according to the above operation. Then plug your home network cable into the WAN port of the router, turn on the wifi to search your router name, if you set the wireless password just enter the password, you can use the ipad to surf the Internet.

If you make a mistake in your password, try a few more times.

Hello, take a closer look at it yourself, the numerator is the denominator -1, the first (odd) is negative, and the second (even) is positive.

And each numerator and denominator are added by two at the same time.

The tenth is 20 21

There is a law here, the nth numerator is 2+2(n-1)=2n, and the denominator is 3+2(n-1)=2n+1

The answer is 2n (2n+1).

There's also the issue of negative numbers.

The first (odd) is negative, and the second (even) is positive, so you can write (-1) to the nth power.

So the final answer is (-1) nx2n (2n+1) I wish you all the best in your studies.

20/21

1)^nx2n/(2n+1)

Good luck with your progress.

We look forward to your adoption, thank you.