Answer:
5 hours
Step-by-step explanation:
Mark recieves 3mg per hour. This can be rewritten as y=3x. Cassie recieves 2x+5. To solve, use substitiution. 3x=2x+5. To solve, subtract "2x" from "3x." You then get x=5.
I believe it is B, but I'm still unsure !
The answer is c 25 minutes btw hope you have a wonderful day
0.9 hope this helps
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