Question 974549
generalizing the description with variables,
Imogene's car traveled d miles averaging a certain speed. If the car had gone k mph faster, the trip would have taken h hour less. Find the average speed, r.



_______________________rate______________time______________distance
Certain________________r_________________t_________________d
IfFaster_______________r+k_______________t-h_______________d


KNOWN
h, k, d


UNKNOWN
r, t


BASIC RELATIONSHIP, EQUATION
RT=D relating rate, time, distance


SYSTEM OF EQUATIONS
{{{system(rt=d,(r+k)(t-h)=d)}}}


Solve the system for r and t.