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Q21: Solve the system by substitution. Substitute the
Q75: Solve the system of linear equations by
Q132: Find the product. Write your answer in
Q141: Factor the problem completely. First, factor out
Q143: Multiply the expressions. <img src="https://d2lvgg3v3hfg70.cloudfront.net/TBX8806/.jpg" alt="Multiply the
Q145: Perform the indicated operation. <img src="https://d2lvgg3v3hfg70.cloudfront.net/TBX8806/.jpg" alt="Perform
Q155: Factor the polynomial completely; that is, once
Q197: Write the expression with a positive exponent,
Q259: Factor the expression as the sum or
Q278: The shorter leg of a right triangle