Using the principle of historical materialism about social basic contradiction, this paper analyzes and explains the rationality and great significance of the scientific outlook on development

Using the principle of historical materialism about social basic contradiction, this paper analyzes and explains the rationality and great significance of the scientific outlook on development

Is the verb be singular or plural in my favorite food is / are orange, apples and ice cream?

Child, use the plural are, there are three items behind, use the plural, although orange doesn't add s

1. Cuboid, 12cm in length, 5cm in width, 6cm in height. The cuboid has a bottom area (), a volume (), and a surface area ()
2. The cuboid has a length of 4, a width of 3, a height of 2 (decimeters), an edge length of () decimeters, a maximum surface area of () square decimeters, a surface area of () and a volume of ()
The cube is 2 meters long, covering an area of () square meters, with a surface area of () square meters and a volume of () cubic meters

1. Cuboid, 12cm in length, 5cm in width, 6cm in height. The cuboid has a bottom area (60cm 2), a volume (360cm 3) and a surface area (324cm 2)
2. The cuboid has a length of 4, a width of 3, a height of 2 (decimeters), an edge length of (96) decimeters, a maximum surface area of (12) square decimeters, a surface area of (52 square decimeters), and a volume of (24 cubic decimeters)

7 and 9, 3 and 8, 4 and 15, 11 and 5

Greatest common divisor: all are 1
Least common multiple: 63, 24, 60, 55

If both sides of △ ABC are 5 and 12 respectively, and C on the other side is odd, and a + B + C is a multiple of 3, then C should be______ This triangle is______ A triangle

∵ 12-5 = 7 ∵ C ∵ 5 + 12 = 17, C is odd, the odd numbers from 7 to 17 are 9, 11, 13, 15, the sum of∵ and a + B is a multiple of 3, ∵ a + B + C = 30, ∵ C = 13 ∵ 52 + 122 = 132, ∵ ABC is a right triangle

If the number a is 36, the greatest common divisor of a and B is 4, and the least common multiple is 288, then the number B is______ ．

Because: the product of two numbers is equal to the least common multiple of two numbers multiplied by the greatest common divisor, so B number is: 288 × 4 △ 36, = 1152 △ 36, = 32; answer: B number is 32, so the answer is: 32

Point P is a point outside the circle C: x ^ + y ^ = 1. Let K1 and K2 be the slopes of two tangent lines of circle C passing through point P respectively. If the coordinates of point P are (2,2), find the value of k1k2

too easy
But this is the first year of high school
(1) Let Y1 = K1 * x + B1, y2 = K2 * x + B2
From x ^ + y ^ = 1, we can see that the center coordinates of the circle are (0,0)
(2) Then according to the point (2,2), we get 2 = 2 * K1 + B1, 2 = 2 * K2 + B2
And the equations obtained in (1) can be solved

Who can tell me what are the words in unit 8 of Volume 2 of Grade 7!

I'd = I would foods noodles beef mutton cabbages cabbage potato potato potato potato special dish drink drink large size bowl size he'd = H

There is only one intersection point between the square + BX + C of the parabola y = x and the x-axis, and the coordinate is (- 2,0)
You'd better help me with another problem,
The symmetry axis of quadratic function image is x = - 1, the intersection of Y axis and ordinate is - 6, and through the point (2,10) to find the relationship of quadratic function

b²－4c＝0
4－2b＋c＝0
c＝2b－4
∴ b²－4﹙2b－4﹚＝0
b²－8b＋16＝0
﹙b－4﹚²＝0
b1＝b2＝4
c＝2×4－4＝4
∴ y＝x²＋4x＋4

Can the 7th power of 25 - the 12th power of 5 be divisible by 240

25^7-5^12
=5^14-5^12
=5^11*(5^3-5)
=5^11*(125-5)
=120*5^11
5 ^ 11 is odd and cannot be divided by 2
So the primitive cannot be divided by 240