Question 842998
__________________speed___________time_________distance
T to C_____________r______________(___)________299
C to J___________r+18_____________(___)________400
TOTAL______________________________8


r for rate or speed
t for time in hours
d for distance in miles
{{{rt=d}}} generally and we can use in the form solved for t to help find expressions for the missing times in the table.



__________________speed___________time_________distance
T to C_____________r______________299/r____________299
C to J___________r+18_____________400/(r+18)________400
TOTAL______________________________8



IMPORTANT EQUATION
{{{highlight(highlight_green(299/r+400/(r+18)=8))}}}


SOLVE FOR r.