The bridge of mind (2) the boy's mind has built an ideal bridge. What does this "ideal bridge" mean?

The bridge of mind (2) the boy's mind has built an ideal bridge. What does this "ideal bridge" mean?

This should be combined with the context. The ideal bridge, now the feeling is that the boy has a clear future, and knows how to realize his future, and has ideas and plans in his heart

Application of linear equation with one variable
For a 2-digit number, the number on the one digit is 5 larger than that on the ten digit, and the sum of the number on the one digit and the number on the ten digit is 6 larger than that of the 2-digit number, find the 2-digit number

Wrong title?

A car drove 225 kilometers at 3 o'clock. At this speed, the car drove 14 hours from city a to city B. how many kilometers are there between city a and city B?

225 △ 3 = 75 (km) this is the speed per hour
75 × 14 = 1050 (km) this is the distance

Given that the square of (a + b) is 7 and the square of (a-b) is 4, find the sum of the squares of a and B

Square of a + square of B = 11 / 2
AB = 3 / 4

Two cases of oranges weigh 56 kg in total. If you take 4 kg out of the second case and put it into the first case, then the second case is 2 kg more than the first case. It turns out that there are two cases of fruits
How many kilos each?

Take 4 kg from the second box and put it into the first box. The second box is 2 kg more than the first box\
At this time, the weight of the first box of fruit is (56-2) / 2 = 54 / 2 = 27 kg, and the weight of the second box is 27 + 2 = 29 kg
So
The weight of the first box of fruit was 27-4 = 23kg, and the weight of the second box was 56-23 = 33kg

(a-b): (B-C): (C-A) = 2:3:7 find the value of 3A + 2b-4c / 2A

(a-b):(b-c):(c-a)=2:3:7
3(a-b)=2(b-c)
7(a-b)=2(c-a)
Well organized,
5b-2c=3a
7b+2c=9a
The solution is b = a, C = a
A-B = 0, so (a-b): (B-C): (C-A) = 2:3:7 does not hold
If the above factors are not taken into account, then:
(3a+2b-4c)/2a=(3+2-4)/2=1/2

There are 240 kg of apples and pears in the fruit shop, of which apples account for 5 / 8 of the total,
Then above: how many kilos of apples do you sell?
Come on, it's 21:28. Who's going to send 10 bonus points before 21:35

240x5/8-240x(1-5/8)(1-1/3)
=150-60
=90 kg
So sell 90 kilograms of apples

-What is the equivalent after 2,4, - 8,16, - 32,64?

-2,4,-8,16,-32,64,-128

What is the sine 10 degrees in trigonometric function

Is it manual?
3sin10°-4sin³10°=sin30°=0.5
Let sin10 ° = X
The above formula becomes 4x & sup3; - 3x + 0.5 = 0. (0 < x < 0.5)
Just solve the equation. If you want to study it, you won't ask me online. Just ask

Xiaogang and his father are now 35 years old. Three years later, his father is 23 years older than Xiaogang. How old are Xiaogang and his father this year

Xiaogang: 35-23 = 12 years old, Dad: 12 + 23 = 35 years old, so simple