Plants propagated with roots, stems and leaves

Plants propagated with roots, stems and leaves

The plants propagated by stem include Wedelia triloba, color leafy grass, golden gedai powder leaf, basil grass, fordii, Impatiens balsamina, sweet potato root; mint, isatis root, strawberry, sweet potato root, potato tuber, reed stem. The plants propagated by leaf include fall root. The plants propagated by leaf include Eclipta, Saxifraga, Saxifraga, purple blue, etc

Simplification: 6x-28-2.5x + 30.5

6x-28-2.5x+30.5
=(6-2.5)x+30.5-28
=3.5x+2.5

The figure on the right is a trapezoidal ground plan. The top bottom is 3cm, the bottom is 5cm, and the height is 4cm. The scale is 1:200. How many square centimeters is its actual area?

The area of trapezoid is (3 + 5) × 4 △ 2 = 16 square centimeter
The scale is 1:200, so the area ratio is 1 ^ 2:200 ^ 2, that is 1:40000
So the actual area is 16 × 40000 = 640000 square centimeters
It should be noted that "scale is 1:200" refers to the scale of length, and the scale converted into area is 1:40000

Remember an interesting thing. Write a good beginning and a good ending

Beginning:
Childhood, like an endless stream, flows slowly in my heart. In this stream, there are both happy laughter and sad tears, but the deepest memory is a stupid thing I did in my childhood. 3. The life of childhood is long and short, how many waves flash in my memory! One of them makes me most unforgettable, Because it is the most interesting and naughty spray in my childhood
ending:
Childhood is naive, and the funny stories of childhood sometimes make people laugh. However, the funny stories of childhood record our growth and leave us beautiful memories
Please refer to the author

If the square of a number is 36, what is the number? (- 1) ^ 2 + (- 1) ^ 3 + (- 1) ^ 4 +(-1)^2012=?

If the square of a number is 36, the number is 6 or - 6
(-1)^2+(-1)^3+(-1)^4… +(- 1) ^ 2012 = 1. Because the subtraction of two adjacent numbers equals 0, the even power of (- 1) is left

What is the shortest length of the wire required to encircle a right triangle with an area of 100

10+2√50、

An isosceles triangle is an axisymmetric figure, and its line is the axis of symmetry. An equilateral triangle has - axes of symmetry

Bisector of vertex, 3

If the line 2aX + BY-2 = 0 (a, B ∈ R +) bisector circle x2 + y2-2x-4y-6 = 0, then the minimum value of 2A + 1b is___ ．

Since the line 2aX + BY-2 = 0 & nbsp; (a, B ∈ R +) bisects the circle, so 2A + 2B = 2, i.e. a + B = 1, then 2A + 1b = (2a + 1b) (a + b) = 3 + 2BA + ab ≥ 3 + 22 (a, B ∈ R + takes the equal sign if and only if a = 2b), the answer is: 3 + 22

Let three points a (1,0) B (0,1) C (2,5) in the plane try to find the module of vector 2Ab + AC, the angle between vector AB and AC, and the coordinate of unit vector perpendicular to vector BC

Vector AB = (0,1) - (1,0) = (- 1,1). Vector BC = (2,5) - (0,1) = (2,4). Vector AC = (2,5) - (1,0) = (1,5). | 2 vector AB + vector AC | ^ 2 = (- 2,2) + (1,5) | ^ 2. = | - 1,7 | ^ 2. = (- 1) ^ 2 + 7 ^ 2. = 50. | | | 2 vector AB + vector AC | = 5 √ 2. --- module of the vector 2Ab + vector AC; | vector ab | = √

It is known that, as shown in the figure, in △ ABC, ∠ a = 90 °, ab = AC, D is the midpoint on the edge of BC, e and F are the points on AB and AC respectively, and be = AF. the proof is ed ⊥ FD

It is proved that if ad is connected, ad = BD, as shown in the figure: ∵ AF = be, ∠ B = ∠ DAC = 45 °, ≌ bed ≌ AFD, ≌ ADF = ∠ BDE, and ∫ BDE + ∠ EDA = 90 ° and ∧ EDF = ∠ ADF + ∠ EDA = 90 °, that is ed ⊥ DF