Question 5779
well, the cost is $300 (this is C), number of days rental is 4 (this is d). Find k.


C= 50d + 0.2k
300 = 50*4 + 0.2k
300 = 200 + 0.2k
100 = 0.2k
k = 100/0.2
k = 500km.


jon.