williamslyric
22.07.2021 •
Mathematics
Trong một lớp học có tỉ số học sinh nam và nữ là 7: 5.Tìm số học sinh của lớp biết số học sinh nam lớn hơn số học sinh nữ là 6 học sinh
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Ответ:
Học sinh nam là 21 học sinh, số học sinh nữ là 15 học sinhH
Step-by-step explanation:
Tỉ số giữa nam và nữ là x/y = 7/5 => x/7 = y/5
áp dụng tính chất của dãy tỉ số bằng nhau, ta được:
x/7 = y/5 => x-y =/7-5 = 6/2 = 3
Vì x/7 = 3 => x = 21
y/5 = 3 => y= 15
Vậy số học sinh nam là 21 học sinh, số học sinh nữ là 15 học sinh
Ответ:
47,04 miles
Step-by-step explanation:
you can clearly see something 20 feet away that you should be able to see from that distance. If a person can see 6 miles from a height of 25 feet, by dividing 196 by 25 we can get the following calculation
196 ÷ 25 = 7,84
Then you gan multiply
7,84 × 6 = 47,04 miles
Or equal to 75703,542 meters