1990 - 21 & 22

This new set is from the 1990 test.

Difficulty: Medium. Framing this algebraically ...

Difficulty: Medium. Finding ALL the solutions and then realizing how to answer the question ...

Standard instructions for this series: No calculator allowed. Express answers in reduced form. Rationalize denominators. Radicals must be reduced. All numbers are base ten unless otherwise specified. Do not approximate radicals or π. Leave such answers as 1025π or √39, for example. Source: UVM Math Contest 2013

answer 21, answer 22, Published 5/16.