|4/5+2/3×(-12)÷6-(-3)²|+24+（-3）²×（-5） -4²×[（1-7）÷6]³+[（-5）³-3]÷（-2）²

|4/5+2/3×(-12)÷6-(-3)²|+24+（-3）²×（-5） -4²×[（1-7）÷6]³+[（-5）³-3]÷（-2）²

Isn't this a question? = | 4 / 5-4 / 3-9 | + 24-9 × 5-16 × [- 1] & sup3; + [- 125-3] △ 4 = | - 8 / 15-9 | + 24-45 + 16-32 = 8 / 15 + 9 + 24-45 + 16-32 = - 36-7 / 15, the result is - 36 and 7 / 15

1. - 0.5 - (- 3 and 1 / 4) + 2.75 - (+ 7 and 1 / 2)
2.[(2/3-1/2)÷1/30]×(-1/5)

1. - 0.5 - (- 3 and 1 / 4) + 2.75 - (+ 7 and 1 / 2)
=-1/2+13/4+11/4-15/2
=13/4+11/4-1/2-15/2
=24/4-16/2
=6-8
=-2
2.[(2/3-1/2)÷1/30]×(-1/5)
=(1/6 *30)*(-1/5)
=5*(-1/5)
=-1

There are three different points ABC on the plane. If you draw a straight line through any two points, you can draw () straight lines
Given that the line AB = 5cm and C is its midpoint, then AC = (), BC = ()
The following is correct ()
Draw a straight line AB B through ab AB.CD Line intersecting at point M C ab.cd Intersect at point M D line AB intersects at point m
If you draw any three straight lines, the intersection point may be ()
A1, B1 or 3, C1 or 2 or 3, d0 or 1 or 2 or 3

3
2.5 2.5
B
D

0.875 × 101-0.875 by a simple method

The solution is 0.875 × 101-0.875 = 0.875 (101-1) = 0.875 × 100 = 87.5

If the polynomial MX & sup3; + 3nxy & sup2; - 2x & sup3; - XY & sup2; + y contains no cubic term, then 2m + 3N =?

There is no cubic term in MX3 + 3nxy2-2x3-xy2 + y
That is, MX3 + 3nxy2-2x3-xy2 + y = mx3-2x3 + 3nxy2-xy2 + y = (m-2) X3 + (3n-1) XY2 + y does not contain cubic term
That is, m-2 = 0
3n-1=0
m=2
n=1/3
Answer: 2m + 3N = 5

The longitude of a place generally corresponds to the time difference between it and coordinated universal time: 24 hours a day, while a circle of longitude has 360 degrees
So the earth rotates 15 degrees an hour. So if a person's local time is 3 hours earlier than coordinated universal time, then he is about 45 degrees east longitude
Then, how is the east longitude calculated?

The standard world time refers to the local time of 0 degree longitude, and the person's location is 3 hours earlier. According to the two rules that the earlier you go to the East, the earlier you get and 1 hour equals 15 degrees, you can see that the person is at 45 degrees east longitude

The first row of 4 determinant is 12-56, the second row is 2041, the third row is 3200, and the fourth row is 4010

Expand by column 2
D = 2*(-1)^(1+2)*
2 4 1
3 2 0
-4 1 0
Then expand by column 3
D = -2* (-1)^(1+3)*
3 2
-4 1
= -2*(3+8)
= -22.

78 / 37 × 79 simple operation, the final answer 37 and 37 / 78, find the process

37/78×79
=37/78×（78+1）
=37+37/78
=37 and 37 / 78

When x tends to infinity, find the limit of [(2x + 3) / (2x-1)] ^ (x + 4)

It should be 1
(2x + 3) / (2x-1) when x tends to infinity, the numerator and denominator are of first order infinity, and the whole tends to 2x / 2x = 1
The infinite power of 1 or 1

41:19 * 13:17 * 17:13 * 19:41 (simple calculation)

41:19 * 13:17 * 17:13 * 19:41
=19 of 41 * 41 of 19 * (17 of 13 * 13 of 17)
=1*1
=1