Ask 3 math questions. Hurry, hurry, hurry

1.In a district middle school students football games 10 rounds (that is, each team plays 10 games), a win is worth 3 points, a draw is worth 0 points, and a loss is -1 point, in the game, a team wins 5 games, loses 3 games, draws 2 games, and asks how many points the team has in the end?

5x3+3x(-1)+2x0=15-3=122, an operation a b=ab+a b is now specified to find the value of 3 (-2).

In this question a=3, b=-2

3 (-2) = 3x(-2)+3-(-2)=-13, if a, b are opposite to each other, c, d are the reciprocal of each other, and the absolute value of m is 5, find.

What is this question for?

1.The addition based on the outer angles is always 360

The sum of the other 2 outer angles is 90

So. n = 45 degrees.

2.Or according to.

The sum of the outer angles is always 360 degrees. Divide by 18

So the inside angle is 180-20=160

3.I remember.

The teacher should have talked about the formula. But it's junior high. I forgot now.

1. Intercept the cube with a length, width and height of 6cm, and the remaining cuboid is 6cm long, 2cm wide and 1cm high, with an area of 12 + 24 + 4 = 40

2. Each side has 10 * 10 = 100, 100 * 4 = 400, minus the four corners painted on three sides of the 400-4 = 396, minus the three sides of the edge painted on the 396-(10-2) * 12 = 396-96 = 300, starting from the middle so 120 * 2 = 240

1d2.Solution: According to the meaning of the question, know.

Student A donated $x, and student B donated (3x-8) yuan.

Then, student C donated 3 4[x+(3x-8)] yuan.

Then the total amount of donations from A, B, and C is: x+(3x-8)+3 4[x+(3x-8)].

x+3x-8+3 4(4x-8)=x+3x-8+3x-6=7x-14Answer: The total amount of donations from A, B, and C is (7x-14) yuan.

1. The team scored 12 points.

2. The last value is -1

3. You don't seem to have written anything you wanted.

Divide. 3. You haven't answered all the questions, what are you asking for?

1.There are 8 identical pillars in a pavilion in the forest park, 3 meters high and 40 centimeters in diameter at the base. Now that all these cylinders are painted, what is the area of the painted part in square meters?

m2Build a cylindrical pool with a bottom diameter of 4 meters and a depth of 3 meters. If the inner wall and bottom of the pool are plastered with cement, how many square meters is the area of the cement plastered part?

2*2* square meters.

3.What is the height of a cylinder with a square centimeter side area and a base diameter of 3 centimeters? Centimeter.

1.There are 8 large pillars in a pavilion in the forest park, 3 meters high, and the bottom diameter is 40cm. How much wood would be used to make one of these columns?

s=ah v=sh

2.The area is the sum of the area of the circle at the bottom plus the area of the circle inside the cylinder, and if the diameter is 3 meters, the radius is 3 2 = meters.

Area s = square meters.

3.Solution:,,=1 (cm);

A: Its bottom surface diameter is 1 cm

So the answer is:1

2.Set up a U.S. brand x yuan.

1680÷x=1＋25%

x=1344

3.Set up x production in October.

1 10%) times x-x = 360

x=3600

1) 1680*(1+25%)=2100

3) If x are produced in October, they will be produced in September. then x=3600 So 3600 were produced in October...

(1)1680-(1-25%)=

2) Solution: The price of a Jiamei brand refrigerator is X yuan.

25%x=1860

Solution: (3) Solution: Set x parts to be produced in October.

10%x=360 solution:

*(1+25%)=2100

2. Set the price of Xinxin brand refrigerator x yuan Jiamei brand refrigerator price y yuan x=y (1+12%)

3. Set the production of parts x in October and the production of parts y in September y=x (1+10%)

y-x=360

So we get x=3600 y=3960

Multiply by [1+25%].

2.Design: The price of a Jiamei brand refrigerator is X yuan.

1-12%】 x=1680

3.Design: October production parts x yuan.

1.The price of a Shin Shin brand refrigerator is 1680 yuan. A Fengle refrigerator is 25% more expensive than a Shin Shin brand refrigerator, how much does a Fengle brand refrigerator cost?

2100 (yuan).

2) A Shin Shin brand refrigerator is 12% more expensive than a Jiamei brand refrigerator, how much is the price of a Jiamei brand refrigerator? (Column Equation).

Design: The price of a Jiamei brand refrigerator is X yuan.

1+12％）x=1680

Solution : 112 x=1680

x=1680÷112％

x=1500

1 48 people.

2 Five out of eight.

3 kilograms and two-ninths of a meter.

1. It is the least common multiple, which is 6*8=48

45 = 75, so 75 120 = 3 5

The length of the meter steel bar weighs 27 kg, and the weight of 1 meter weighs 27 divided by 6=, and the length of the steel bar of 1 kg is 1000 divided by the meter.

- It's that simple.

1 question 6 8=48 people.

Question 2 [120-45] 120=

3 questions 27 6 6 27 meters.

1, the numerator and denominator are added to 1, and the score obtained is larger than the original. The further back you add, the closer the value of the fraction is to 1.

For example, 1 2 2 3 3 3 4 4 4 5 ......Converted to a decimal is the price of 100, the profit is 25%, and the cost of socks is 75%, that is, 75 yuan.

The selling price is increased by 20%, that is, 120 yuan, and the cost remains unchanged at 75 yuan, so the profit is 125-75 = 50 yuan.

Profit margin 50 125 = 40%.

3. A does it for 6 days and B does it for 10 days, which can be seen as A and B do it together for 6 days and B for 4 days.

Because A and B do it all together for 18 days, then A and B do it together for 6 days, and it will be 1 3 of the total project, and 2 3 will be left

B then does 4 days, and there are 7 12 left, then B does 2 31 12, that is, B 4 days to announce that he has done 1 12 of all the work, and does (1 12) 4=1 48 every day

So Huai Xianyi did the remaining 7 12 alone, and it still took time.

7 12) (1 48) = 28 days.

1.One positive and one negative, and the absolute value is minus 2

1.One positive and one negative, the absolute value is negative.

2. 7486248624……Obviously. 20*25 500 turns out to be 505

3.4 times.

1 All 1(m+1)2=(m-3)2 m2+2m+1=m2-6m+9 so m=1 This number is 4

3a+b=16 a=5 b=1 So the answer is 2 roots, 2y=3, so the answer is 3

(1) Set the positive number to x from the question

then the root number x=m+1

Root number x=m-3

Subtract the two formulas.

x=4(2) is obtained by adding and subtracting 2a-b=9 and 3a+b=16.

a=5,b=1

Then the square root of a-2b is root number 3

3) I can't understand the question.