Examlex
Solve the system by the addition method. If there is no solution or an infinite number of solutions, so state. Use set
notation to express the solution set.
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Night's Sleep
A period of sleep taking place during the night, important for physical and mental recovery and health.
Brain Waves
Electrical impulses in the brain that are visible on an electroencephalogram (EEG), indicative of different states of consciousness.
Sleep Stages
The different phases of sleep that a person goes through in a cycle, including REM (rapid eye movement) and various degrees of non-REM sleep.
Eye Movements
The voluntary or involuntary movement of the eyes, which can include blinking, and movements to follow visual objects or read.
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