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Given that x+y = 7 and 3x+y = 45, evaluate x^2-y^2.
Answers: 1
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Acomputer store buys a computer system at a cost of $370.80. the selling price was first at $ 618, but then the store advertised a 20 % markdown on the system. answer parts a and b. a. find the current sale price.
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Given that x+y = 7 and 3x+y = 45, evaluate x^2-y^2....
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