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Let the first disc have x pcs.

x+4 is the same number, a total of 4 plates, 100 sugars, so 4 (x+4) = 100

x=21 and then it's very simple, you're sure to do the math.

The maximum rectangle length: 4 + 4 = 8 (cm), width 2 (cm), circumference: 2 (8 + 2) = 20 (cm) that is, two rectangles are fought horizontally.

The maximum square side length is 4 (cm), and the circumference is 4*4=16 (cm), that is, two rectangles are spelled vertically.

Do not overlap when spelling).

The maximum rectangle circumference is 20 cm.

The maximum square circumference is 16 cm.

Two rectangles as long as they do not overlap the splicing.

The area is all the same.

y*=4x alignment equation x=-p 2=-1, so it's good to pretend to be p=2. Therefore, the standard high cherry equation is y*=2px=4x. You can see the second chapter of the high school mathematics elective 1-1 "Conic Curves and Equations" in the People's Education Edition.

The axis of symmetry is the x-axis, and the equation for the quasi-transport cong friend line is x=-1 Which one is wrong?

The axis of symmetry is the x-axis, and the equation for the alignment is y=-1.

Because the vertex of the parabola is at the origin, the axis of symmetry is the x-axis.

Therefore, the equation for throwing the Zheng letter line is of type x =2py.

p=2 is solved by -p 2=-1

The equation for a parabola is x =4y

If the equation for the parabola is: y 2 = 2px, then the quasi-line equation for the parabola is: x=-p, 2=-1

The solution slips: p=2

So, the parabolic equation is: y 2=4x

4. DA is correct, 8 vertices.

b is correct, 12 edges, the one in the middle of each edge is colored on 2 sides c is correct, and the middle piece is not colored.

d False, the center of each of the 6 faces is one color.

5. B2 times.

Divided into 3,3,2 to weigh, if two groups of 3 are the same, in 2 is said if the two groups of 3 are different, in the less group continues to be divided into 1,1,1 to weigh, less is.

3π。The area of the 1 4 circle of 2 3 is decelerated by the area of the blank part, (the blank part includes the area of the blank triangle and the area of the triangle minus the area of the triangle from the 1 4 circle of 1 3) 2 3 1 4 6 1 2 3 3 (1 3 1 4 6 1 2 3 3 3).

x to the power of 5 x 4x (x 2 times + 2) (x + root number 2) (x - root number 2).

A to the 2nd power b 1