Math I question 5 and I have a problem. Mathematical

Today, there are chickens and rabbits in the same cage, with 35 heads on the top and 94 feet on the bottom, and ask how many chickens and rabbits each have (using a binary system of equations to solve).

Solution: Set x chickens and rabbits.

From the title: x=35-y 1

2x+4y=94 2

Substituting 1 into 2 gives 2(35-y)+4y=94

70-2y+4y=94

2y=24y=12

Substituting y=12 into 1 gives x=23

So the solution of the original equation is: x=23

y=12A There are 23 chickens and 12 rabbits.

This is the title in the "Sun Tzu Sutra", and the solution is "put the head on the top, put the foot on the bottom, and remove the foot by one head (the meaning of dividing is subtracting) to remove the head with the foot, that is, to get".

First set the golden rooster independent (half of its feet), which is a total of 94 legs 2 = 47. Among the 47 legs, there should be a chicken for every leg, and there should be a rabbit for every two legs, that is to say, the number of heads and feet of the chicken is equal, and the number of heads of each rabbit is one less than the number of feet, so the number of rabbits is 47-35=12;The number of chickens is 35-12=23. In general, if x is the number of chickens and y is the number of rabbits, then x+y=35

2x+4y=94

The solution is x=23 y=12

Equipped with x chickens, y rabbits.

x+y=35 (1)

2x+4y=94 (2)

2)-(1)*2,2y=24,y=12

x=35-12=23

So there are 23 chickens, 12 rabbits.

Summary. Hello, what is the math problem you want to ask, I will help you solve it!

I have a question. Mathematical

Hello, what is the math problem you want to ask, I will help you solve it!

Trouble to answer with the knowledge of the sixth grade, thank you!

Okay, wait a minute.

You can set the unknown x by the question: 3x+44 3x+2x=5, 625x=18x+264x=, so there are 190 in total.

Summary. Do you have a specific topic? You can send ** over, so that the teacher can see more clearly, and can better solve the problem for you!

Do you have a specific topic? You can send ** over, so that the teacher can see more clearly, and can better solve the problem for you!

OK, see your **.

Is there any difference between option D in A for this question?

There is a difference, pay attention to the order.

The triangles are equal depending on the order.

The order must be counterclockwise, right?

No, it means that the two orders must be the same.

If you are counterclockwise, the other must be counterclockwise.

Okay, got it.

It's the same clockwise.

Summary. This problem is really too difficult, and the result of the current calculation is to get ab=I want to ask you a math problem.

There are three circles that are separated from each other, the circle a(xa,ya) radius ra(xb,yb) radius rb circle c(xc,yb) radius rc, and find the coordinates of the center of the circle o (xo,yo) with which it is tangent

Let me start by saying that I'm not a student, and I want your help to give a direct answer, thank you.

Please substitute the set xa, ya, etc. for the value.

Yes. Ok thanks.

This problem is really too difficult, and the result of the current calculation is to get ab = you don't need to calculate the data, just list the formula.

It might be better to use analytic geometry.

Now it's the trigonometric function of the application.

You can set the value with a few characters.

The general idea is to put the two strings of DE and CF. If the radius of the circle can be derived, then its location can be deduced according to the Pythagorean theorem.

With circular equations, hyperbolas and the like.

In general, the circle equation should also be determined according to three points, and the circle can be obtained by three points.

That is, to determine these three tangent points.

The idea is this idea.

This document doesn't look helpful to you.

Okay, let me refer to it, this calculation process is too cumbersome.

This is completely different from this useless concept.