There are 56 students in Grade 6 of Houcun primary school, of which 37 are boys. Later, they were transferred to several male students. At this time, male students account for 715% of the class. How many male students were transferred?

56 × (1-37) / (1-715), = 56 × 47 × 158, = 60 (people); 60-56 = 4 (people). A: four male students

There are 56 students in a class, of which three out of seven are boys. Later, how many boys are transferred into the class? This is the number of boys, which is seven out of eight of the number of girls
schoolboy?

56 × 3 / 7 = 24 boys
56 × (1-3 / 7) = 32 girls
32 × 7 / 8-24 = 4 people turn in

In tree planting activities, the ratio of planting trees in grade five to grade six is 5:7. How many trees are there in each of the two grades?
Requirements: Please list the arithmetic solution

5+7=12
7/12-5/12=1/6
40 / 1 / 6 = 40 * 6 = 240 (trees)
240 * 5 / 12 = 100 (trees)
240 * 7 / 12 = 140 (trees)
A: there are 100 trees in grade five and 140 trees in grade six

The speed of an airplane is 340m / s, how many meters per minute? How many kilometers per hour?

340x60 = 20400 meters per minute
20400x60 = 1224000 M = 1224 km / h

Unit 3 Section B 3a in Grade 8
I'll give you points for quick answers

Ben Lambert,the famous French singer,is talking a long vacation this summer!He thought about going to Greece or Spain,but decided on Canada.“I always take vacations in Europe,”he said.“This time I want to do something different.I heard that Canada is beautiful,and I know there are many people there who speak French.”
Ben is going to Canada’s Great Lakes.He is leaving the first week in June and staying until September.He plans to have a very relaxing vacation.“I’m taking walks,going fishing,and going bike riding.I’m planning to spend time in the beautiful countryside.I hope I can forget all my problems!At night, I’m renting videos and sleeping a lot...A great vacation!I can’t wait!”

The greatest common factor of 90 and 75

Please note that [negative one] is less than or equal to y and less than or equal to nine. If you know the first-order function y = KX + B, when - 3 ≤ x ≤ 1, the corresponding value of Y is - 1 ≤ y ≤ 9. Find the value of K

When k is greater than zero, the function is an increasing function with (- 3, - 1) and (9,1), and the solution is k = - 1 / 6, B = - 1 / 2. Similarly, when k is less than zero, the function is a decreasing function with (- 3,1) and (- 1,9), and the solution is k = - 1 / 6, B = 1 / 2

Calculation: 1 + AB + 1 (a + 1) (B + 1) +... + 1 (a + 9) + (B + 9), where (A-1) (A-1) + | ab-2 | = 2

Are you sure it's right?
It should be (A-1) (A-1) + | ab-2 | = 0
The answer is 10 / 11

The number of chickens is 14 more than that of ducks, and the number of ducks is less than that of chickens___ ．

Let the number of ducks be 1, then the number of chickens is: 1 × (1 + 14) = 1.25; (1.25-1) △ 1.25 = 0.25 △ 1.25 = 15; answer: the number of ducks is 15 less than that of chickens

Let f (x) = 3x, f (a) = 2, G (x) = 3ax-4x. (1) find the analytic expression of G (x); (2) find the range of G (x) when x ∈ [- 2, 1]

(1) From F (a) = 2, 3A = 2, a = log32, ∧ g (x) = (3a) x-4x = (3log32) x − 4x = 2x-4x = - (2x) 2 + 2x. ∧ g (x) = - (2x) 2 + 2x. (2) let 2x = t, ∧ x ∈ [- 2, 1], ∧ 14 ≤ t ≤ 2. ∧ g (T) = − T2 + T = − (t − 12) 2 + 14 ∧ t = 12, that is, when x = - 1, G (x) = (- 2, 1) ∧ g (x) = (3a) x-4x = (3log32) x − 4x 4x 4x = (

There are 56 students in Grade 6 of Houcun primary school, of which 37 are boys. Later, they were transferred to several male students. At this time, male students account for 715% of the class. How many male students were transferred?