There is a question that someone else gives, and someone will do it

That is, 8 yuan can buy 1+1 3 Coke, and each Coke is filled with 3 coupons.

It's not the same as 3 empty cans for one Coke. Empty cans for Coke can reuse empty cans.

It is equivalent to buying 4 cups, if you only buy it with money, it will cost 32 yuan, but you spend a total of 24 yuan, that is, you save 8 far, then a prize ticket is 8 3 (8 divided by 3) yuan.

If you buy 3 bottles, it is equivalent to buying 4 bottles, and the money for buying 3 bottles is equal to the money for buying 4 bottles, 3*8=24, that is, the money for buying 3 bottles, 24 divided by 4=6, 6 is **after**, 6 divided by 3=2, 2 yuan per coupon. Note: When you only have two tickets, it's worthless!

Let's have something interesting.

If you buy 99 bottles of Coke, you pay 8*99=792 yuan.

The store gave you 99 coupons, and you exchanged 33 bottles of Coke.

Then you drank (99 33) bottles of Coke for a total of 792 yuan.

6 yuan per bottle, so 2 yuan per coupon.

If you buy three bottles of Coke, you pay $3 8 24.

The store gives you 3 vouchers and you exchange for a bottle of Coke.

Then you drank a total of 4 bottles of Coke for 24 yuan, each bottle is 6 yuan, so a coupon is 2 yuan.

Everything else is the same.

The actual ** of a glass of Coke = ** of Coke - ** of the lottery ticket. ** of 3 tickets = actual ** of a cup of Coke, so let the ** of the ticket be x, then, 3x = 8-x

x=2 got it?

For 24 yuan, you can drink 3 Coke, get 3 lottery tickets, and get 1 Coke.

So 24 yuan can get 4 times.

6 yuan per cup of Coke.

8-6 = 2 yuan.

3*8=24 yuan 3+1=4 bottles 24 4=6 yuan 8-6=2 yuan But if you don't buy 3 bottles or multiples of 3, it's different.

The question is, what are you talking about is from the micro and not the macro? Macroscopically speaking, it should be 2 yuan.

You should have a supplement to exchange Coke is also a lottery ticket.

I'm 5:2, but I don't know if it's right or not. I'm sorry to be wrong".

Solution: Suppose A and B bought a total of 8 yuan of goods x pieces, 9 yuan of hidden goods y pieces, and each person bought n pieces of goods.

Get: x + y = 2n

8 x + 9 y = 172 ②

By minus x 8, the head of the stove is counted as: y = 172 - 16n, x = 18n - 172.

From the title: x = 18n - 172 0 , y = 172 - 16n 0 .

Solution: 86 9 n 43 4

The integer n can only be 10, and substituting it yields x = 8, y = 12

A total of 8 pieces were bought for 8 yuan, and 12 pieces for 9 yuan in Qinzhong.

a=5b+5=6c+6=7d+7

5(b+1)=6(c+1)=7(d+1)

So a is an integer multiple of 210, the least common multiple of 5,6,7.

So A can only be a Ignition 210

b=210 5-1=41

c=210 Bishi 6-1=34

d=210/7-1=29

a+b+c+d=210+41+34+29=314

a=5b+5=5(b+1)

a=6c+6=6(c+1)

a=7d+7=7(d+1)

So a is a multiple of 5,6,7.

The least common multiple of 5, 6, and 7 is 5, 6, 7, = 210, and if the trace does not exceed 400, then a does not coincide with more than 400

So the posture is a=210

b=a/5-1=41

c=a/6-1=34

d=a/7-1=29

a+b+c+d=314

The production likelihood curve is concave to the origin (i.e., convex outward) and reflects (b) aResources are equally efficient in all production activitiesb. Law of Increasing Costs c Existence ** Decision d High Unemployment Rate The standard answer is:

b Analysis: The slope of the production possibility curve is related to the marginal conversion rate. Because the marginal conversion rate increases, the production possibility curve is concave.

The marginal conversion rate increase is determined by the cost increase. The concave origin of the production possibility boundary indicates that the opportunity cost increases as a product increases. It can also be said that it is the increment of opportunity cost that determines the concave origin of the production possibility boundary.

The increase in opportunity cost is due to the fact that some resources are suitable for the production of a certain product, but when they are used to produce other products, their efficiency decreases (i.e., the output per unit of resource decreases). This phenomenon is also prevalent in the real economy.

The relative atomic mass of magnesium is 24 and the relative atomic mass of aluminum is 27, with a ratio of 8:9

Therefore, the ratio of the number of atoms contained in magnesium and aluminum of the same mass is: 8

If c is all mass, then the ratio is (m 24) :(m 27) = 9:8

Solution: 15 8) x(16 9) y(27 10) z5 x*3 x*16 y*3 (3z) (2 (3x)*2 (3x)*5 z*2 z).

5 (x-z)*3 (x+2z-2y)*2 (4y-3x-z)16, so: x-z=0,x+2z-2y=0 y=3 2x,4y-3x-z=4

The summoned trap is solved: x=1 2, z=1 2, y=3 4 So: 2x+y and the ruler plexus z-y=-7

15, 8, 16, 9, 27, and 10 are factored respectively, and then combined to multiply three integer exponents by Sun Loss, so that all three terms are zero, and the values of x, y, and z can be solved. The same is the solution to the 1st floor of the envy of the divine will.

The area of ABED = S( ABC) - S ( EDC) folded up, easy to know wild potato, ED perpendicular to AC then CED is similar to CAB CD = AC 2

rt abc, it is easy to know, ac=5, so cd=5 2 because it is similar, therefore, cd cb=de ba is based only ed=15 8 so s(edc)=75 32

So the area of the Celestial Blade of abed = 117 32

Is angle b a right angle? Also, the area of ABCD? Where's D?