It is known that Xiaoqiang was born six years earlier than Xiaogang. This year, Xiaoqiang's age is three years younger than Xiaogang's age, which is two times of Xiaogang's age. What's the sum of their ages this year______ I'm 40 years old

Let Xiaogang be x years old this year, then Xiaoqiang's age is 2x-3 years old, 2x-3-x = 6, & nbsp; & nbsp; x-3 = 6, & nbsp; & nbsp; & nbsp; & nbsp; X = 9, Xiaoqiang's age is 2x-3 = 2 × 9-3 = 15, the sum of their ages this year is 9 + 15 = 24 (years old), a: the sum of their ages this year is 24

English translation
There are so many people in such a big shopping center
The boy with a book in his hand is one of my close friends
We have to wait until the end of the game
He has many things to do, but I have nothing to do
On their way here, they drank eight drinks of milk
If so, why don't you take us to the local theater to enjoy Beijing opera?
The sick cashier doesn't want to see a doctor or be hospitalized
You don't have to hold a welcome party for me
9. I need to buy something else for the party. Three loaves of bread, two catties of beef and four packets of French fries are not enough
There are jars everywhere. Whose do they belong to?

1.there are so many people in such a huge mall.
2.that boy with a book in hand was one of my close friends.
3.we had to wait till the competition ended.
4.he has lots of things to do, while i have nothing (to do).
5.they drunk 8 cups of milk on their way here.
6.in this case, why don't you take us to the local theatre for Peking opera?
7.that sick cashier doesn't want to see a doctor and be in hospital.
8.it's unnecessary to hold a welcome meeting for me.
9.i have to buy some more food for the party. 3 bread, 2 kilos beef and 4 packs of chips are not enough.
10.jars are everywhere.whom do they belong to ?
Their own translation, for reference only, I hope to help you

The point representing an integer on the number axis is called integral point. The unit length of a certain number axis is one centimeter. How many integral points% d% a can be covered by drawing a line segment of 2010cm on the number axis

From 0 to 2010. A total of 2011 integers

Two math problems,
1. The Xiaoming family used 68 tons of water in October, 15% less than that in September. How many tons of water was used in September?
2. There are 36 pines and cypresses. The squirrel is 80% of the cypress. How many pines and cypresses are there?

68 ÷ (1-15%) = 80 tons
There are 36 (1 + 80%) cypress trees = 20
There are 36-20 pine trees = 16

If 1 / 5x ^ 3Y ^ m + N and 2x ^ 2m-ny ^ 3 are of the same kind, then M=_ ,n=_ How to solve this kind of problem
Find the method,

From the theme
M + n = 3A
2m-n = 3B formula
a+b=3m=6
M = 1 substituting M = 1 into formula a
So n = 2

How many kilograms per 1000 cubic meters is 2 kilograms per 2714 cubic centimeters

1 m = 100 cm
1 cubic meter = 100 × 100 × 100 cubic centimeter = 1000000 cubic centimeter
1000 cubic meters = 1000 × 1 cubic meters = 1000 × 1000000 = 100000000 cubic centimeters
How much is 2714 cubic centimeter equal to 1000 cubic meters
=2714÷1000000000
=0.000002714 (1000m3)
2÷0.000002714
=736919.675 (kg / 1000 m3)

The railway between Party A and Party B is 480 km long. Passenger cars and freight cars leave from both places at the same time. After 4 hours, it is known that passenger cars travel 65 km per hour,
The freight car travels x kilometers per hour. The incorrect equation is ()
A、65×4+4x=480
B、4x=480-65
C、65+x=480÷4
D、(65+x)×4=480

B、4x=480-65

How to calculate the formula of stone weight

If the density is known, the volume of the stone is measured by the drainage method. Mass = density * volume

Calculation: 2 (x3) 2 · X3 - (3x3) 3 + (5x) 2 · X7

The original formula = 2x6 · x3-27x9 + 25x2 · X7 = 2x9-27x9 + 25x9 = (2-27 + 25) x9 = 0

For a 2-meter-long cylindrical wood, after cutting off a 2-decimeter-long cylindrical block, the surface area is reduced by 12.56 square decimeters. What is the volume of the original wood?

The bottom radius of the cylinder: 12.56 △ 2 △ 3.14 △ 2, = 12.56 △ 2 (2 × 3.14 × 2), = 12.56 △ 12.56, = 1 (decimeter); the volume of the steel: 2m = 20 decimeter, 3.14 × 12 × 20, = 3.14 × 1 × 20, = 62.8 (square decimeter); answer: the original volume of the steel is 62.8 cubic decimeter

It is known that Xiaoqiang was born six years earlier than Xiaogang. This year, Xiaoqiang's age is three years younger than Xiaogang's age, which is two times of Xiaogang's age. What's the sum of their ages this year______ I'm 40 years old