A mobile communication company has set up two kinds of communication services: Globallink: the user pays 50 yuan monthly rent first, and then 1 point for each call, and then pays 0.4 yuan for each call; Fastlink: no monthly rent is paid. Each call pays 0.6 yuan / minute, and less than 1 point in the two communication services is calculated as 1 point (1) If the call time in a month is x (x is the charging time of the century), try to use the formula containing x to express the cost of two kinds of calls

Global cost: 50 + xx0.4
Cost of express solution: 0.6xx

In the parallelogram ABCD, e is the midpoint of AD, AC and be intersect at F, if s △ EFC = 1cm2, then the area of parallelogram ABCD is smaller=______ ．

∵ e is the midpoint of AD, ∵ AE = De, ∵ the height of AE on the side of ∵ AEC is equal to the height of De on the side of ∵ Dec, ∵ s △ ace = s △ CED, similarly: ∵ ad = BC, ∵ s △ ABC = s △ ACD = 12s parallelogram ABCD, ∵ parallelogram ABCD, ∥ ad ∥ BC, ad = BC, ∥ afcf = aebc = 12, ∥ s △ CFE = 2S △ a

How many square meters is the negative cubic centimeter of 5 * 10 equal to

Two vehicles a and B leave AB at the same time. Four hours later, the two vehicles meet at 120 km from the midpoint. It is known that the speed of vehicle a is 710 of that of vehicle B. what are the speeds of vehicle a and B? How many kilometers are the two places apart?

120 △ 12-77 + 10, = 120 △ 1734-1434, = 120 △ 334, = 120 × 343, = 1360 (km); the speed of car B is 1360 △ 4 △ 1 + 710, = 340 × 1017, = 200 (km); the speed of car a is 200 × 710 = 140 (km); a: the speed of car a and car B are 140 km and 200 km respectively, and the distance between two places is 1360 km

The area of isosceles triangle with 5 cm hypotenuse is

What has a hypotenuse in a triangle has only a right triangle
The square of the right side is 25 / 2
The area of isosceles triangle with 5 cm hypotenuse is
25/4cm²

Given ABC three integers, a + B = 252, B + C = 197, C + a = 149, then a = ()

Both B and C are represented by A
From C + a = 149, we can get: C = 149-a;
From B + C = 197, B = 197-c replaces C with C = 149-a, so B = 197 - (149-a)
So finally B = 48 + A;
Then we can know from the formula: a + B = 252;
A+(48+A)=252;
So a = 102;

During the festival, there is a square flower bed in the center of the square. There are three layers of chrysanthemums outside the flower bed. There are 10 pots on each side of the outermost layer. How many pots of chrysanthemums are put in total? If there are 20 pots on each side of the outermost layer, how many pots of chrysanthemums are put in total?
(these two questions are about the three floors outside the flower bed.)

Each side of the outermost 10 pots, the outermost layer: 10 + 10 + 8 + 8 = 36 (POTS), the second layer: 8 + 8 + 6 + 6 = 28 (POTS), the third layer: 6 + 6 + 4 + 4 = 20 (POTS), a total of: 36 + 28 + 20 = 84 (POTS). Each side of the outermost 20 pots, the outermost layer: 20 + 20 + 18 + 18 = 76 (POTS), the second layer: 18 + 18 + 1616 = 68 (POTS) the third layer

If the side length of a square is increased by 2 cm, the area will be increased by 36 square cm. It turns out that the side length of this square is 2 cm______ Cm

The length of the side of the original square is a centimeter, and the title is: 2A × 2 + 2 × 2 = 36, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; by the title: 2A × 2 + 2 × 2 + 2 × 2 = 36, 36, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; &A = 8; a: it turns out that the side length of this square is 8 cm. So the answer is: 8

If the real numbers a and B satisfy the a power of 2 + B power of 2 = a + B power of 2, then the minimum value of a power of 2 + B + 1 power of 2

x=2^a,y=2^b
The condition is equivalent to
x+y=xy
The formula is equivalent to x + 2Y
X + y = XY
(x-1)(y-1)=1
x+2y = (x-1) + 2(y-1) + 3
≥ 2 radical [2 (x-1) (Y-1)] + 3
=2√2 + 3
When x = 1 + √ 2, y = 1 + √ 2 / 2

There is a product in the store that has been reduced by 20% for two consecutive times. Now the price is 144 yuan. How much is the original price? I made a mistake, but I won't change it,

144 = original price * 80% * 80%
Original price * 0.64 = 144
Original price = 225 yuan