(1) Line segments AC and BC are on the same line, AC = 6cm, BC = 2cm, and the distance between the midpoint of line segments AB and BC is?

(1) Line segments AC and BC are on the same line, AC = 6cm, BC = 2cm, and the distance between the midpoint of line segments AB and BC is?

Segment AC and BC are on the same line, AC = 6cm, BC = 2cm
So AB = ac-bc = 6-2 = 4cm
The midpoint of AB is 4 △ 2 = 2cm
The midpoint of BC is 2 △ 2 = 1cm
2+1＝3CM
So the distance between the midpoint of AB and BC is 3cm

1 and 2 / 3 + 2 and 3 / 4 +.. + 1000 and 1001 / 1002 + 1001 and 1002 / 1003 =?

I think it is: = 2 - 1 / 3 + 3 - 1 / 4 +... + 1001 - 1 / 1002 + 1002 - 1 / 1003 = (2 + 3 +... + 1002) - (1 / 3 + 1 / 4 +... + 1 / 1003) = 1004 * 1001 / 2 - (1 / 3 + 1 / 4 +... + 1 / 1003) = 502502 - (1 / 3 + 1 / 4 +... + 1 / 1003)

x(x－√5)＝√5－x x－6x－19＝0 y－15＝2y 5x(x－3)－(x－3)(x＋
x(x－√5)＝√5－x
x－6x－19＝0
y－15＝2y
5x(x－3)－(x－3)(x＋1)＝0

The first question is: X (x - √ 5) = √ 5-x1. When X - √ 5 = 0, the equation holds, so x = √ 52. When X - √ 5 ≠ 0, divide both sides of the equation by (x - √ 5) at the same time to get x = - 1. The second question is: x-6x-19 = 0-5x = 19x = - 19 / 5. The third question is: Y-15 = 2Y, the left y moves to the right, y = = = - 15. The fourth question is: 5x (x-3) - (x-3) (...)

Often reading extracurricular books can enrich and improve our reading ability!

Reading extracurricular books often can enrich our knowledge and improve our reading ability!

In 1985, 1998, 2004, 2005 and 2100, leap year is______ ．

In the whole hundred years, 2100 is not a multiple of 400, it is a normal year; in the remaining years, the multiple of 4 is 2004; there is one leap year; there are three non multiple of 4, it is a normal year; answer: the normal year is 1985199820052100; leap year is 2004. So the answer is: 2004

How many nanometers is the negative seventh meter of 10

1m = 10 ^ 9nm
10 ^ - 7m = 10 ^ 2nm = 100nm

Xiao Gang read 56 pages a day and 8 / 11 of the whole book in three days. How many pages are there? How many left?

Total: 3x56 / 8x11 = 231 pages
Not seen: 231-56x3 = 63 pages

Do you get along well with children

Are you good with kids?

32 degrees, 30 degrees, 9 minutes and 36 seconds

48.32 degrees equals 48 degrees 19 minutes 12 seconds; 30 degrees 9 minutes 36 seconds equals 30.16 degrees

Immerse an iron ball in a rectangular glass container with a length of 25 cm and a width of 20 cm. When the height of the water surface rises from 6 cm to 8 cm, how many square centimeters is the glass area in contact with water

25×20+25×8×2+20×8×2=500+400+320=1220（cm²）
(one bottom area + two front and back areas + two left and right areas)
A: This is the glass in contact with water. The area is 1220cm