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Marathon runner A runs at a speed of 7.5 miles per hour (MPH) while the rate of runner B is 8.3 miles per hour (MPH). If the current position of runner A is at the 25-mile mark and runner B is at the 23-mile mark, in how many hours will it take for them to cover the same distance?

 Sep 22, 2021
 #1
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25 + 7.5 x    =   23 + 8.3 x       solve for x  ( hours)

 Sep 22, 2021
 #2
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i dont get that

Guest Sep 22, 2021
 #3
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Can you be more specific?

ElectricPavlov  Sep 22, 2021
 #4
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i get nothing

Guest Sep 22, 2021
 #5
avatar+35059 
+1

You are looking for the time at which they will both be the same distance

 

rate X time = distance  

 

 

for the first runner   distance = 25 miles + 7.5 m/hr * x        where x is the time in hours

   theis equals the total distance for the second runner    23  miles + 8.3 m/hr * x

 

 

25 + 7.5    23 + 8.3 x       solve for (  in hours)  when they will be at the same distance .....

ElectricPavlov  Sep 22, 2021

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