Free ACT Practice Question

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ID: ACT-M-15
Section: Math
Topics: Algebra; Algebraic expressions
Difficulty level: Medium

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Let $\#$ be an operation on $x$ and $y$ defined as $x \# y = \dfrac{x^2 + y^2}{x + y}$. Find the value of $1 \# 1 \# 5$ given that the operations are performed from left to right.

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