Answer:
5n+3
Step-by-step explanation:
Answer:
B. 2106 pi mm³
Step-by-step explanation:
the solution is attached,
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Answer:
a) 
b) 1.5 hours after thickness will be 2 inches.
Step-by-step explanation:

I believe the answer is 2x+2y= 20-21 or 2x+2y= -1. Think about Standard Form= Ax+By= C