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Xiao Wang gets off at 1 / 3 of the whole journey and Lao Li gets off at 3 / 4 of the whole journey. Lin Lin pays 35 yuan in total when he arrives at the terminal. The scheme of three person fare sharing is designed
Solve it with equations!
Let Xiao Wang cope with 1 / 3x, Lao Li cope with 3 / 4x, and Lin Lin's whole journey be set to X
The equation is 1 / 3x + 3 / 4x + x = 35
The value of X is: x = 84 / 5 yuan (16.8 yuan)
Then the three of them should each pay 5.6 yuan, 12.6 yuan and 16.8 yuan
Salt content formula
Is the formula the weight of salt divided by the weight of brine or the weight of clean water?
Salt content = weight of salt / weight of brine * 100%
Who can tell the formula of germination rate, attendance rate, survival rate and oil yield? Please hurry up!
Percentage of germinated seeds in total seeds
Calculation formula of attendance rate
Attendance days / due attendance days * 100%
Calculate the attendance rate, germination rate, qualified rate and survival rate
Don't use the "/" in those formulas. Don't use the letter formula
Attendance rate = attendance days divided by total days;
Germination rate = the number of germinated seeds divided by the total number of seeds;
Qualified rate = the number of qualified products divided by the total number of products;
Survival rate = the number of survival divided by the total number
When the total number of people is fixed, what is the proportion between attendance rate and attendance? Why?
Positive proportion
Because the quotient of attendance number and attendance rate is the total number, and the total number is fixed, so it is in positive proportion
In the following percentages, () must be less than 100%
A. Qualified rate B. attendance rate C. germination rate D. oil production rate
Because the oil yield = the weight of the oil and the weight of the refined oil × 100%, it is impossible for all of them to become oil, otherwise they will be pure oil. Because there are still dregs, the oil yield can only be less than the total amount of the refined oil, that is, it can only be less than 100%
What is the proportion between the actual attendance and the attendance rate when the number of people who should be on duty is fixed?
Attendance rate = actual attendance / due attendance. When the number of due attendance is fixed, the more the actual attendance, the higher the attendance rate
There is a certain number of people in the class, the number of attendance and absence & nbsp; ()
A. In proportion B. in inverse proportion C. out of proportion
The number of attendances + the number of absentees = the number of the whole class (a certain number), yes and a certain number, so the number of attendances and the number of absentees are not in proportion
In addition to attendance rate, germination rate, pass rate. What other rates? And say the meaning of other rates
Survival rate
The number of trees that survive when transplanted
birth rate
The number of births in a region
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