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OpenStudy (anonymous):
Explain how we evaluate an algebraic expression for given values of the variables. How would we evaluate the expression "3x - 4y + 9" when x = 2 and y = 5?
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OpenStudy (bahrom7893):
substitute 2 for x and 5 for y: 3*2 - 4*5 + 9 = 6 - 20 + 9 = -5
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