, C = D = the value of a, D, C after the expression Let the values of a and B be 6 and 7 respectively, and point out the values of a, B, C and d after calculating the following expressions respectively （1）c=d=a (2)b+=b (3)c=b/=a (4)d=(c=a/b+15)

, C = D = the value of a, D, C after the expression Let the values of a and B be 6 and 7 respectively, and point out the values of a, B, C and d after calculating the following expressions respectively （1）c=d=a (2)b+=b (3)c=b/=a (4)d=(c=a/b+15)

(1)c=6 d=6 a=6
(2)b=b+b=14
(3)c=b=b/a a=6 b=1 c=1
(4)c=15 d=15

If a = 3, B = 4, C = 5, then the value of the expression a + b > C & & B = = C is

0 or false

If a = 8, B = 4, C = 2, what is the value of the expression! (a-b + C-1 & & B + C / 2)

#include <stdio.h>void main(){    int a=8,b=4,c=2;    printf("%d\n", !(a-b+c-1&&b+c/2));}
The result was 0

What is the physical meaning of the density of water?

The mass of one cubic meter of water is 1000 kg

The charging standard of taxi in a city is as follows: 9 yuan for less than 3000 meters, and 2 yuan for every kilometer in the future
Xiaodong took a taxi from century square to Wenyuan community and paid 29 yuan. How many kilometers is it from century square to Wenyuan community?

Let X be
9+（x-3）*2=29
2x-6=20
X = 13 km

The ratio of length to width of a rectangle is 5; 3, diagonal 2 √ 17, find the length and width, and reserve the root sign

The length, width and diagonal of a rectangle form a right triangle
Then let length = 5A and width = 3A
Then 25a and 178; + 9a and 178; = 68
34a²=68
a²=2
a=√2
Length = 5 √ 2, width = 3 √ 2

In △ ABC, it is known that ∠ C = 90 °, C = 2, (a + b) 2 = 6, and the triangle area is obtained

From (a + b) ^ 2 = 6,
We get a ^ 2 + 2Ab + B ^ 2 = 6,
In right triangle, Pythagorean theorem, a ^ 2 + B ^ 2 = C ^ 2 = 4,
So 2Ab = 6-4 = 2,
Area s = AB / 2 = 1 / 2

The specific heat capacity of water is 4.2 × 103J / (kg ·℃), and the calorific value of bituminous coal is about 3 × 107j / kg? (2) What is the heat released by the complete combustion of 1.4kg bituminous coal? (3) What is the reason that the heat released by complete combustion of bituminous coal is far greater than that absorbed by water?

(1) The heat absorbed by water q = cm △ t = 4.2 × 103J / (kg ·℃) × 10kg × 80 ℃ = 3.36 × 106j; (2) the heat released by complete combustion of 1.4kg bituminous coal q = MQ = 3 × 107j / kg × 1.4kg = 4.2 × 107j; (1) the heat absorbed by water is 3.36 × 106j; (2) the heat released by complete combustion of 1.4kg bituminous coal q = MQ = 3 × 107j / kg × 1.4kg = 4.2 × 107j

A square with a circumference of 9.42 decimeters can be encircled by a piece of iron wire. If the iron wire is used to encircle a circle, how many square decimeters is the area of the circle?

Hello
Radius of a circle
9.42 △ 3.14 △ 2 = 1.5 (decimeter)
Area of a circle
3.14 × 1.5 × 1.5 = 7.065 (square decimeter)

To prove that an integer greater than 11 can be expressed as the sum of two composite numbers
Please answer in detail,

There is a conceptual problem in this question. We can only say "yes" instead of "definitely"
Why can't we say "definitely"
Because 5 + 7 = 12 is greater than 11, 5 and 7 are prime numbers; 3 + 9 = 12 is greater than 11, 3 is prime number, 9 is composite number
We can only say "yes":
4 + 8 = 12 is greater than 11, 4 and 8 are composite numbers