73
Question:
Let $\Psi$ be the relation defined by $A\ \Psi\ B=2A+5B$. What is the value of $9\ \Psi\ (3\ \Psi\ 1)$?
Answer:
Let's think step by step.

user
73
Let $\Psi$ be the relation defined by $A\ \Psi\ B=2A+5B$. What is the value of $9\ \Psi\ (3\ \Psi\ 1)$?
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