Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 3 - Logic - 3.2 Compound Statements and Connectives - Exercise Set 3.2 - Page 133: 76

Answer

See below.

Work Step by Step

Adding the brackets: $ r\leftrightarrow(q \land p)$. This means that not $r$ if and only if ($q$ and $p$), thus a statement is: We go to the beach if and only if the temperature is above 85 degrees and we have finished studying.
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