Please as soon as possible, thanks! Mathematics requires detailed process analysis .

1. The total length of this road is x kilometers, and the equation is:

65%x solved.

x kilometers Second, if the unit price of a small towel is x yuan, then the unit price of a large towel is 2x+11, and the equation is:

40(x+2x+11) 3200 Solution:

x＝﹙23﹚

The unit price of a large towel is 2*23+11 57 yuan, and the unit price of a small towel is 23 yuan.

3. Let Xiaohua have x pieces of sugar, then Xiao Ming has 4x pieces of sugar, and the column equation:

4x-13) x+13 7 5 solution.

x 12 Xiao Ming has 4x 4 x 12 48

The two had a total of 60 pieces of sugar.

1) (dividing by 65% equals kilometers.)

2) Set the small towel for x yuan and the large towel for 2x+11 yuan.

Then 40 multiplied by (x+2x+11) equals 3200

If x is equal to 23, then the large towel is equal to 57

3) Let the total number be equal to x, (4 5x-13) divided by (1 5x+13) equal to 7 5, and the solution x is equal to 60

Because the least common multiple of 60 and 90 is 180, that is to say, there are 54 footprints that coincide with Xiaojun and Dad.

Then Xiaojun has 54 footprints, and Dad's footprints have 54. There are a total of 60 + 90 = 150 footprints of the two people.

Since there are 30 overlapping footprints, there are 150-30=120 footprints on the snow.

The process is as follows: divide first to get the least common multiple of 60 and 90 is 180 (there is no way to type).

180cm= 54 pcs).

54 pcs) 54 pcs) 60+90=150 (pcs) 150-30=120 pcs

Answer: Solution: The least common multiple of 60 and 90 is 180, 180 90 = 2, 180 60 = 3

That is, the footprints of the father in 2 steps coincide with the 3 steps of Xiaojun, 60cm = , 90cm = 54

The least common multiple of 54 and is .

54 footprints = 90 + 60 - 30 = 120.

Dad: 54 steps.

Small Army: 54 steps.

The minimum common multiple is 180 cm.

Coincident footprints: 54 steps.

Total footprints: 60-30 + 90-30 = 90 steps.

54÷ 54÷

The least common multiples of 60 cm and 90 cm areThat is, the footprints of the father 2 steps and the 3 steps of the small army coincide) 54

Footprints = 90 + 60 - 30 = 120.

The step length of the small army is 60 cm, the step length of the father is 90 cm, the small army walks three steps, and the father walks two steps, that is, 180 cm will have a footprint to coincide;

54 meters, Dad left a total of 54 footprints, Xiaojun left 54 footprints, and the two overlapped 54 footprints;

So a total of 60 + 90-30 = 120 footprints were left.

<> the figure is cracked and the ant is buried in the source.

Don't give a point, and there are so many questions. Dream on.

Hello, I think this problem can be solved like this:

I won't draw the picture, I just need to connect AO and CO).

Solution: Let cp=x.

op is the center distance of the pin string, op cd, cp=dp=x, cd=2x.

op=1 2cd,op=cp=dp=x.

ab=2cd(Is there a mistake in the subject of Lou Loss?）ab=4x。

In RT COP, CO = (root hail Lee 2) x, in RT AOP = (root number 5) x, r r = root number 2 root number 5 = root number 10 5.

a is the orthogonal bridge cluster matrix.

So the transposition of a = the inverse merge of a.

The inverse of a = a (i.e. the adjoint matrix of a.

a|, so a star = a inverse.

So the transposition of 12a -11a star = 12a inverse-11a inverse = a inverse and orange.

The inverse of A is A, so choose C

（2550÷34）×（34+16）

3750 (yuan).

A: Now I earn an average of 3,750 yuan per day.

If tana=root number 3, then a=60 degrees, the clan stares at Zhaoxiang with sinacosa=sin60 degrees cos60 degrees.

Root rule or number 3 2) x (1 2).

Root No. 3) 4.