5 / 8-4 / 1 × 9 / 8 ／ 2 / 3 / 7 / 6 × 8 / 5 + 3 / 6 / 7 / 8 5 / 8-1 / 4 × 8 / 9 ／ 2 / 3 6 / 7 × 5 / 8 + 3 / 8 △ 7 / 6

5 / 8-4 / 1 × 9 / 8 ／ 2 / 3 / 7 / 6 × 8 / 5 + 3 / 6 / 7 / 8 5 / 8-1 / 4 × 8 / 9 ／ 2 / 3 6 / 7 × 5 / 8 + 3 / 8 △ 7 / 6

5 / 8-1 / 4 × 8 / 9 ／ 2 / 3
=5/8-2/9×3/2
=5/8-1/3
=7/24
4 / 5 + 4 / 15-2 / 5
=12/15+4/15-6/15
=10/15
=2/3
6 / 7 × 5 / 8 + 3 / 8 △ 7 / 6
=6/7×5/8+3/8×6/7
=6/7×（5/8+3/8）
=6/7×1
=6/7

(1) 9 / 10 / 8 / 3 / 5 / 1 (2) 4 / 7 / 5 / 1 × 7 (3) 4 / 3 × 15 / 8 × 6 / 5
(4) 5 / 8 ／ 7 / 12 ／ 10 / 7 (5) 4 × 12 / 5 ／ 9 / 5 (6) 15 ／ 10 / 9 × 5 / 3 (the title may not be written, but the serial number must be written.)

Oh, my God,
Direct reduction (1) = 12 (2) = 20 (3) = 1 / 3 (4) = 3 / 4 (5) = 3 (6) = 10

32 out of 60 = 8 out of 60, 1 out of 4 = 64 out of 60, 7 out of 10 = 14 out of 60, 5 out of 9 = 15 out of 60

32 out of 60 = 8 out of 15,
1 / 4 = 16 / 64,
7 out of 10 = 14 out of 20,
5 out of 9 = 15 out of 27

Three tenths of a batch of cement was transported in the first day, two fifths in the second day, and eight tons more in the second day than in the first day. How many tons are there in total?

8÷（2/5-3/10）
=8÷1/10
=80 tons

The vector a = (1, sin θ), B = (1, cos θ), if a · B = 35, then sin 2 θ=______ ．

∵ a · B = 1 + sin θ cos θ = 1 + 12sin2 θ = 35 ∵ sin2 θ = − 45, so the answer is: − 45

A pile of yellow sand was transported to the construction site. After 58 tons of yellow sand was used, the rest was 36 tons less than that used?

A: there used to be 144 tons of yellow sand

Y = x ^ 3 + X + 2 find its inverse function

Answer: the inverse function of Y ^ 3 + Y-X + 2 = 0 is actually y = f (x), where x and Y exchange roles (1). The image of two functions that are inverse functions of each other is symmetrical about the line y = X. for example, the inverse function of y = 2x-1 is y = 0.5x + 0.5y = 2 ^ x, and the inverse function of y = log2 X. for example, the definition field of the inverse function of y = 3x-2 of y = 3x-2 is

The number of male staff is three fifths of the number of female staff, and the number of female staff is a fraction of the total number of the company

The number of male staff is three fifths of the number of female staff, and the number of female staff is five fifths of the total number of the company

The integer solution of the equation XY + 2x + y = 0?

xy+2x+y=0
y(x+1)+2x+2=2
y(x+1)+2(x+1)=2
(2+y)(x+1)=2
Because X and y are integers
therefore
2 + y = 1, x + 1 = 2, or 2 + y = - 1, x + 1 = - 2 or 2 + y = 2, x + 1 = 1 or 2 + y = - 2, x + 1 = - 1
Solution
Y = - 1, x = 1 or y = - 3, x = - 3, or y = 0, x = 0 or y = - 4, x = - 2
There are four solutions

There are 48 students in class 6 (1) and 43 students in class 6 (2). The number of students who reach the standard of physical education accounts for 8 / 13 of the total number of students in Grade 6. How many students reach the standard of physical education in Grade 6
There are 48 students in class 6 (1) and 43 students in class 6 (2). In a physical test, the number of students who reach the standard accounts for 8 / 13 of the total number of students in the whole grade. How many students reach the standard in the sixth grade? I always feel that the conditions are not enough.

My understanding is that 48 students in class 1 have reached the standard, 43 students in class 2 have reached the standard, a total of 91 students, which is 8 / 13 of the total number of students who have reached the standard in the whole grade
Then the number of students who have reached the standard in the whole grade is 91 divided by 8 / 13, which is not an integer
So the title is wrong or the information given is not clear
There should be more than two classes in a grade