Jodie bikes 4 km/h faster than Dennis. In the same time it takes Dennis to bike 36 km, Jodie can bike 48 km. How fats does each bicyclist travel?
Dennis= ? km/h
Jodie= ? km/h

Question

Jodie bikes 4 km/h faster than Dennis.  In the same time it takes Dennis to bike 36 km, Jodie can bike 48 km.  How fats does each bicyclist travel? 
Dennis= ? km/h
Jodie=    ? km/h

anonymous · Answer

*fast

dumbcow · Answer

distance = rate*time
Dennis:
36 = rt
Jodie
48 = (r+4)t = rt +4t
use substitution
replace rt in 2nd equation with 36
48 = 36 +4t
4t = 12
t = 3

dumbcow · Answer

oops not done yet
so
r = 36/t = 36/3 = 12

anonymous · Answer

dennise =12km/h
jodie =16km/h