You only have variables, so this problem is unsolvable
Answer:
Amy is (21.6 - 14.4) 7.2 km/hr faster than Bill.
Distance = speed / time
Amy's speed
40 minutes = 40/60 = 2/3 hours
14.4 = speed / 2/3
Speed = 14.4 * 3/2 = 21.6 km/ hr
Bill speed
60 minutes = 1 hour
Speed = 14.4 km / hr.
I believe the answer is y = -5/2x + 6
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Answer: The answer is A
Step-by-step explanation: 4c+6a<120 and 4c+4a<100