To make a table and four legs, 20 tables can be made from 1 cubic meter of wood, or 400 table legs can be made from 12 cubic meters of wood. How many tables can be made

To make a table and four legs, 20 tables can be made from 1 cubic meter of wood, or 400 table legs can be made from 12 cubic meters of wood. How many tables can be made

200
Suppose there are x tables and Y legs
Each table has X: y = 1:4
y=4x
x/20+y/400=12
The solution is x = 100
You can make 200 tables

A table consists of a table top and four table legs. It is known that 50 tables or 300 table legs can be made from cubic meters of wood. Now there are 5 cubic meters of wood. How to distribute the wood to match the table top and table legs? How many tables can be assembled?

If the table top is x meters, the table legs are 5-x
50x * 4 = (5-x) * 300
x=3
So the table top is 3 meters and the legs are 2 meters

Timber volume table: timber is 3.5 meters long, big end diameter is 0.47 meters, small end diameter is 0.4 meters, please help to calculate how many cubic meters it is
The distance between the two cities is 10000m. A rides a bicycle and B walks. The speed of a is four times faster than that of B. on the way, a's bicycle breaks down and the repair of the car is delayed for some time. When B arrives at B, a is 200m away from B. how long does it take for a to repair the car and B to walk

0.5145 M3

Calculation problems in mathematics of grade seven published by people's Education Press
Positive and negative, one variable linear equation, comprehensive type, 5 simple, 5 difficult
Hurry! Everybody, please~

5 simple: 8 + (- 9) + 1 =? (35 + 5) - (34-4) =? X + 15-6 =? 4x-30 = - 6 10x = 40 + 5x 5 difficult: (- 5) * 6 + 30 / 2 =? [(- 8) / 2] * 5-10 =? (- x) + 20 * 2 = 4x (50 / 2 + 5) x + 30 = 90 [5x - (- 10) * 5] - 4 * 5 = 15 note: * denotes multiplication, / denotes Division)

The remainder of the 2011 rabbit number divided by 25

When rabbit sequence F1 = 1, F2 = 1, f (n + 2) = f (n + 1) + F (n) n > = 1, I
The rule of finding the remainder of rabbit sequence to 25 is 1,1,2,3,5,8,13,21,9,5,14,19,8,2,10,12,22,9,6,15,21,11,7,18, as if the period length is 100
The remainder of number 2011 divided by 25 is the same as that of number 11 divided by 25
14

Given that 2 of a = 4 of B = 7 of C, and a: B: C ≠ 0, find 4A + 3b-2c -------- 2A + 3b-4c

Let a = 2T, B = 4T, C = 7T
(4a+3b-2c) /(2a+3b-4c)
=(8t+12t+14t)/(4t+12t-28t)
=34/(-12)
=-17/6

Summary of the knowledge of physical state change in the eighth grade

There are three basic physical states of matter: solid state, liquid state and gas state. The process of matter changing from one state to another is called change of state of matter. The process of change of state of matter includes: Melting: solid → liquid (endothermic) iron turns into molten iron; solidification: liquid → solid (exothermic) water turns into ice; molten steel casts into wheel; vaporization: liquid

What is the law of black and white

Black increases by 1, white does not change!

How many cubic power equal to 628? Urgent!

8.56

The average score of Chinese and mathematics is 94. The average score of Chinese and English is 92. The average score of English and mathematics is 97. What's the score of each of the three subjects?

94*2+92*2+97*2=566
It is the total score of two Chinese subjects, two mathematics subjects and two English subjects
566 divided by 2 = 283 is the total score of three subjects
283-94 * 2 = 95 is English score
283-92 * 2 = 99 is the math score
283-97 * 2 = 89 is the result of Chinese
OK, I hope I can help
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