Answer:
Student-A:
mile/min
Student-B:
mile/min
Student-C:
mile/min
Step-by-step explanation:
Student-A:
she can run 2/3 mile in six minutes
so,
total distance is
miles
total time =6 min
we can use formula
speed=(total distance)/(total time)
![speed=\frac{\frac{2}{3} }{6}](https://tex.z-dn.net/?f=speed%3D%5Cfrac%7B%5Cfrac%7B2%7D%7B3%7D%20%7D%7B6%7D)
mile/min
Student-B:
she can run 1/2 mile in 4 minutes
so,
total distance is
miles
total time =4 min
we can use formula
speed=(total distance)/(total time)
![speed=\frac{\frac{1}{2} }{4}](https://tex.z-dn.net/?f=speed%3D%5Cfrac%7B%5Cfrac%7B1%7D%7B2%7D%20%7D%7B4%7D)
mile/min
Student-C:
she can run 4/5 mile in 8 minutes
so,
total distance is
miles
total time =8 min
we can use formula
speed=(total distance)/(total time)
![speed=\frac{\frac{4}{5} }{8}](https://tex.z-dn.net/?f=speed%3D%5Cfrac%7B%5Cfrac%7B4%7D%7B5%7D%20%7D%7B8%7D)
mile/min
Answer:
5
Step-by-step explanation:
I presume you're trying to find n, so first remove the 7 from each side.
8n + 7 -7 = 31-7
=> 8n = 24
Then divide both sides by 8, as you want only n
8n/8 = 24/8
n = 3