Then: boys-boys111= girls -5 and girls =152-x.
x- 1/ 1 1x = 152-x-5
10/ 1 1x = 147-x
x+ 10/ 1 1x = 147
x=77
Female = 152-77=75 (person)
2. Let two people * * * get X yuan (one person stays in 25 yuan, two people stay in 50 yuan, and use x-50).
6/ 1 1x-7/ 12(x-50)= 5/ 1 1x-5/ 12(x-50)
x= 1 10
110 * 6/11= 60 yuan.
3. 1-( 1/ 15+ 1/ 10)*2=2/3
2/3/115 =10 (days)
4. Proportion:
Suppose it takes x days to complete the task.
5:40%=x: 100%
x= 12.54
Arithmetic: 600/5= 120 (pieces)
600/40%= 1500 (piece)
1500/120 =12.5 (days)
Math problem-ask, ah, ah, ah, ah, ah, ah, ah, ah, ah, ah, ah 600t-500 (5.5-t) = 0.600t = 500 (5.5-t).
600 tons -500 tons =2750
100t = 275t = 2.75h。
Answer: This plane should be able to fly out of 600t (finally calculated by itself) kilometers and then return.
Ask a physical question, ah, ah, ah, ah, ah, ah, ah, ah, ah, ah, ah, ah, ah, ah. The boat is floating on the water.
Three-question mathematical process: thank you, ah, ah, ah, ah, ah, ah, ah, ah, ah. = 2x32-4x3x 3( 1/2)2+4x 1/2 = 18。 =(3^2+4x3x 1/2)/(2x3x 1/2- 1/2^2)=(9+6)/(3- 1/4)=60/ 1 1；
1 1 . a+3 = 0； a =-3； b-4 = 0； b = 4； (a+b)-(a-b)^2=(-3+4)-(-3-4)^2= 1-49=-48；
2a-3b+a^2+2ab+b^2=2x(-3)-3x4+(-3)^2+2x(-3)x4+4^2=-6- 12+9-24+ 16=- 17；
12.(2x-y)/(x+3y)= 2； (x+3y)/(2x-y)= 1/2；
(4x-2y)/(x+3y)-(4x+ 12y)/(2x-y)= 2(2x-y)/(x+3y)-4(x+3y)/(2x-y)= 2 x2-4x 1/2 = 4-2 = 2
How? Ah, ah, ah, ah, ah, ah, ah, ah. Is this the suicide note of Jia Dao in Tang Dynasty? The picture is quite similar. "When I asked your student under a pine tree," he replied, "My teacher went to pick herbs". However, through these clouds, how can I know which corner of the mountain it is facing? . "
Math problems ah ah ah ah ah ah ah ah ah ah. Original formula = x 6m+y 3n-x 4my 9n.
=(x^2m)？ +y^3n-(x^2m)？ (y^3n)？
=3? +2-3? ×2?
=27+2-72
=-43
Brush the task, ah, ah, ah, ah, ah, ah, ah, ah, ah, ah, ah, ah, ah, ah. Question the mission?
Congratulations on the completion.
Detailed explanation of physics in senior high school: ah, ah, ah, ah, ah, ah, ah, ah, ah, ah, ah, ah, ah, ah, ah, ah, ah, ah, ah, ah, ah, ah, the law of resistance: at the same temperature, the resistance of a conductor is directly proportional to its length and inversely proportional to its cross-sectional product.
Expression: R = ρL/S
ρ: resistivity, reflecting the conductivity of the material. Different materials have different resistivity.
Suppose the length of the B resistor is L and the cross-sectional area is S = π r?
So: The length of a resistor is 2L, and the cross-sectional area is 4S = π (2r)? = 4π r？ The diameter is twice, and the radius is twice.
The same material, then the resistivity ρ is the same.
So:
Rb = ρL / S
Ra = ρ2L / 4S = ( 1/2) ρL / S
Namely: Rb = 2Ra
Because "the resistance wire ab is connected in two circuits respectively", they do not affect each other.
"If the two resistance wires in the circuit consume the same electric power", that is, Pa = Pb.
According to: P = U? /R
Get:
Pa = Ua？ /Ra
Pb = Ub？ /Rb = Ub？ /2Ra
Requirement "Pa = Pb"
Yes: Ua? Ub？ /2Ra
Ua？ /Ub？ = 1/2
Ua/Ub = 1/√2 (√2 is the root number 2).
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Ah, ah, ah, ah, ah, ah, ah, ah, ah, ah, ah, ah, ah, ah, ah, ah, ah, ah, ah, because her mother won't let you two get along well, she really broke up with you. Do you think this kind of girl is worth insisting on?
To put it bluntly, it is not that she is not brave enough, but that her feelings with you are not deep enough, and you are not worth fighting for by her and her family.
I also texted that I broke up, and I haven't even met. If I were you, I would ignore him, okay.
Young man, this girl is really not so good.