Mathematics Junior 1 Application Questions: Urgent, Urgent, !! Velocity!!!!!

Solution: There are x classes, then there are (10x+5) sets of Hypertherm.

From the meaning of the title. 10x+5>=13(x-1）

10x+5<13（x-1）+4

Solve this inequality group.

14 3 because x is an integer.

So x=5 or 6

So Hypertherm has 10x+5=55 or 65 (sets).

A: The primary school has 5 or 6 classes, and Hypertherm has a total of 55 or 65 sets.

If you use inequality, you can't solve the level of the first year of junior high school.

Equation: Yes, the primary school has x classes, and Hypertherm has a total of Y sets.

10x+5=y

13x-10=y

Answer: There are 5 classes in the primary school, and there are 55 sets of Haibao.

If each class has 10 sets, then there are five sets left, and the Hypertherm number ends with 5. x 10, remainder 5, x may 15, 25, 35, 45, 55...

If the previous class has 13 sets per class, then the last class has Hypertherm but less than 4 sets, then the remainder of x 13 < 4, x > 13

Then the minimum suitable number is 55, 55 13 = (55-13 * (5-1)) = 3 all satisfied.

Setting: The primary school has x classes.

10x+5=13(x-1)+3

x=510x+5=55

A: The primary school has 5 classes, and Hypertherm has a total of 55 sets.

Solution: There are x classes in this primary school, and there are Y Treasures in total. Then: 10x+5=y 13x-4=y solution x=3 y=35 Answer.

Solution *80 100 (1+20 100)=200

2. Let the speed of the aircraft be x, and the formula is (2+5 6)(x+20)=3(x-20), because 1 hour is equal to 60 minutes, so 2 hours and 50 minutes = 2+5 6=17 6 get x=2040 (kilometers and hours) 3. (1) solve the equation of selling x sets 200*75 100*x=200*80 100*(x-1) to obtain x=16(2).

6x-6y-2x-2y-4x+4y+4x+4y

4x just remove the parentheses and simplify.

1) Assuming that Zhao Hongjia's other income this year is a yuan, then:

Zhao Hongjia's agricultural income this year ( ) yuan; Expected agricultural income next year ( ) yuan; Estimated other income (a) next year; The total income of this year ( ) yuan; It is expected that the total revenue for the whole year next year will be ( ) yuan;

2) Will Zhao Hongjia's total income for next year increase or decrease compared to this year? How can you tell?

Next year will be lower than this year, because all other incomes are A, unchanged, and agricultural income is expected to decrease by 20% next year, so it is reduced.

If you have any questions, you can hi chat、Actually, I think the topic seems to be a bit of a problem.,Use hi to chat.。

It's time to think for yourself.

Used to. 2.It depends on what's going on in front of you.

The landlord has learned to think for himself.

Pig: Happy New Year, Landlord, Academic performance rises.

This year's other income is a yuan, so this year's agricultural income is, so it is expected that next year's income is.

Because the title does not tell the relationship between other income and agricultural income next year, it is expected that next year's other income will be a, and the total income for the whole year will be expected to be the total income for the whole year next year.

So next year is less than this year.

Zhao Hongjia's agricultural income this year ( ) yuan; Expected agricultural income next year ( ) yuan; Estimated other income (a) next year; The total income of this year ( ) yuan; It is expected that the total revenue for the whole year next year will be ( ) yuan;

2) Zhao Hongjia's total annual income next year is lower than this year.

Total revenue for the full year next year is <

Zhao Hongjia's other income this year is a, agricultural income is times of other income, then this year's agricultural income is the first empty), next year's agricultural income will be reduced by 20%, then next year's agricultural income will be the second empty), next year's other income is a (the third empty, the title said), this year's total income is the fourth empty), next year's total income is the fifth empty).

Their family's income will decrease next year, because A must be greater than 0, so it is greater than, so the income is reduced.

A this year's is next year's.

If A sold $x million last year, then B is (150-x).

5x=100

then b last year 150-100=50

This year a b 170-115=55

Solution: If supermarket A sales last year were x, then supermarket B was (150-x) (1+15%) x + (1+10%) (150-x) = 170 solution: x = 100, so supermarket A sales this year is 10,000 yuan.

B supermarket sales this year are 550,000 yuan.

Suppose the turnover of A last year was x0,000, and the turnover of supermarket B was Y, then there is x+y=150

The solution is x=100 y=50

So this year, the turnover of supermarket A is: 1.15 million, and the turnover of supermarket B is: 550,000.