Who can solve a math problem? Need to solve a math problem?

The unsupported ones have (-10)*26=-260 points, and the total score plus the unsupported ones is equal to the supported scores, so 1260+260=1520, and then 1520 10=152, so there are 152 people who support, and finally use 152-26=126, and the answer is 126 people!

Support: (1260+260) 10=152

152-26 = 126 people.

Because 26*10 points are deducted, 260 is added to the score when the points are not deducted.

The total score of all the spectators present is: 1260 + 10 26 = 1520 The total number of spectators is: 1520 10 = 152

Total number of supporters: 152 - 26=126 (people) More viewers support the family to participate in the next episode than non-supporters: 126 - 26=100 (people).

Solution: The formula for the volume of the cone is v=base area * height 3

So cone volume = cubic centimeters.

The height of the rising water surface = the volume increased The area of the bottom of the cylinder = decimeter = decimeter.

According to the title, the sum of three integers is 15, and the sum of any two numbers is greater than the third number, so there are 5 kinds of 26

A can complete it all in 20 days, and A's efficiency is to complete it every day.

1 20 = 1 20 (1/20).

A production took 5 days and was completed.

5 1 20 = 1 4, 1-1 4 = 3 4 B completes 3 4 It takes 12 days for B to complete, and B's efficiency is to complete it every day.

A and B efficiency and yes.

1 20 + 1 16 = 4 80 + 5 80 = 9 80 A and B are completed together.

3 4 to. 3 4 9 80 = days.

It cannot be completed within 6 days.

A completes 1 20 of the project every day, and after 5 days, there is still 1-5 * 1 20 = 3 4 B completes the project every day (3 4) 12 = 1 16 The remaining project A and B cooperate with (3 4) (1 20 + 1 16) = 20 3 = 6 and 2 3 days.

So it can't be done in 6 days.

There are two algorithms: one is to calculate whether the amount of cooperation in 6 days is 1, and the other is whether it needs x days to complete 6

I'll just say that method 1 is good, and this one is relatively simple.

After 6 days of cooperation, they have completed a total of :

So it can be done.

Method 2: It will take x days to complete.

1/20*5+（1/20+1/12）*x=11/4+2/15x=1

2/15x=3/4

x=so it can be done.

Convert to, and so on.

32 is a constant x is a variable.

2. 26T = 2000 when x = 2000 = 14t = 4000 for 8

The total number of rows in the nth row and above is:

1＋2n－1）×n÷2

Solution [1 2(n-1) 1] (n-1) 2< 2004< (1 2n 1) n 2

Available 2004 at line 45.

Solution: (1) After X years, the total area of undeveloped tidal flats can exceed 5.28 million mu, then 2x+, x 15

Therefore, after 15 years, the total area of undeveloped tidal flats can exceed 5.28 million mu (2) After y years, the annual income of the city's tidal flat tourism and developed tidal flats will be 35.2 million yuan more than that in 2002.

200y+, solution: y=8

Therefore, after eight years, the annual income of the city's tidal flat tourism and developed tidal flats will be 35.2 million yuan more than that in 2002