There is another math problem that will not be solved, please explain the meaning of each step. Than

Buy: 1000 = 16800 (yuan).

16800 1+ yuan).

Sell: $1000).

16400 yuan).

Gains: Yuan) He loses Yuan.

Buy 1000* is the sum of the cost and handling fee.

Selling 1000* is the money you get from selling**.

The fee paid for selling**.

So lose yuan.

A total of 0 1 yuan in a week, that is, 16 9 yuan on Friday, the total value is 16 9 1000 16900 yuan, the cost is 16800 16800 0 2 16900 0 2 16867 4, the income is 16900 16867 33 yuan.

Dizzy. I don't know. What grade are you? Study hard in the future, listen to the teacher's explanation, understand? Dizzy. Well, goodbye.

The area of the oh swept part is pi

CB=2,AB=4,AC=2 3,CH=AC2= 3Nexus BH,BH1,BH= (BC2+CH2)= 7,The area of the outer sector HH1BH (rotation angle 120): 120*PI*BH2 360

The area of the inner sector CO1BC (rotation angle 120): 120*pi*BC2 360

The curved triangle enclosed by the outer arc hh1, o1h1 and a1b is equal to the curved triangle enclosed by the outer arc hh1, oh and ab, therefore.

The area of the oh swept part = the area of the outer sector HH1BH - the area of the inner sector CO1BC 120*pi*BH2 360-120*pi*BC2 360pi*(BH2-BC2) 3=pi

First-year students.

Classes: On-campus and off-campus activities: 25%.

Sleep, eat and wash.

5th graders.

Classes: 25%.

On-campus and off-campus activities.

Sleep, eat and wash.

Self-study first graders sleep time = 24 ( = hours 5th graders sleep time = 24 ( = hours.

5th graders self-study time = 24 ( = hours.

Set the first grade sleep time to x

x=24*x=set the fifth grade sleep time to x

x=24*x=5th grade, self-study time is x

x=24*x=

First-year students.

Sleep time = 24 * hours.

5th graders.

Sleep time = 24 * hours.

Self-study time = 24-2-10-4-6 = 2 hours.

The duration of first-grade sleep is hours.

Fifth-graders sleep for hours.

The self-study time for fifth-graders is hours.

First-year students.

Class = 24*hours.

On-campus and off-campus activity time = 24 * 25% = 6 hours.

Sleep time = 24 * hours.

3 meals & washes = 24-11-6-5 = 2 hours for 5th graders.

Class = 24 * 25% = 6 hours.

On-campus and off-campus activity time = 24 * hours.

Sleep time = 24 * hours.

3 meals and washing time = 24 * hours.

Self-study time = 24-2-10-4-6 = 2 hours.

Set up to fly x km.

x/1500+x/1200=6

9x/6000=6

x=4000

Fly up to 4000 km.

Let this plane fly up to x kilometers.

x 2 1500 + x 2 1200 = 6 to get x = 8000

The plane flew up to 8,000 kilometers.

0 people, a total of 22 + 18 + 16 = 56 people in the event.

The actual number of participants was 36

Therefore, 20 of them are repeated, and 20 people in mathematics can repeatedly apply for physics or chemistry, so they only apply for two subjects repeatedly, and those who apply for three subjects can have none.

1. All of them are sold at a profit of 40% according to the yuan, that is, 280 yuan is sold, so there are a total of 200 kilograms. Part of it is sold for 1 yuan, and part of it is sold for 1 yuan, making a profit of 10%, that is, it is sold for 220 yuan, and then the equation is set: the apples sold by the yuan are x kilograms, and x=50

2. If the ticket is x, then x+, x=1000

Beg!!!

Set to sell x kilograms and 1 to sell y kilograms.

Solve equations.