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Unformatted text preview: . The solution set is an infinite Set of ordered pairs representing the points on the line. 1. Solve each system by substitution. Is the system consistent, inconsistent or has dependent equations? a) 2 3 1 x y + = b) 2 1 x y + = 2 y x ! = 2 4 8 x y + = 2. A manufacturer of plastic bags has total revenue given by the function x x R 20 ) ( = and has total cost given by 400 15 ) ( + = x x C , where x is the number of plastic bags produced and sold. Find the number of units that gives break even for the product. 3. Suppose you have $500,000 to invest, part at 15% and the remainder in a less risky investment at 6%. If your investment goal is to have an annual income of $42,000, how much should you put in each investment? [Let x be the amount invested at 15% and y be the amount invested at 6%.]...
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 Summer '07
 RUSSEL
 Algebra, Linear Equations, Equations

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