Patient A - 150 mg
Patient B - 50 mg
I hope this helps :)
Answer:

Step-by-step explanation:
I would explain but then I would sound like an idiot
y=mx+ b
Answer:
$57.44
Step-by-step explanation:
1. subtract 15% from the bill with coupon:
$56.32 - ($56.32 x 0.15) = $47.87
2. add 20% to this new bill:
$47.87+(47.87 x 0.20) = $57.44