Ex: Evaluate a Variable Expression with Exponents and Fractions

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This video provides and example of how to evaluate a variable expression with fractions and exponents.
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thanks for the help :) im pretty hopeless in math and i have a mid-term coming up so i wanted to strengthen my basics so i wont feel dumb when i look at a problem like this that i should know. i forget things pretty easily. thank you :) 

unicornlover