Systems of Equations

Michigan State University - Diagnostic Exam

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3.4

Which of the following are the x-coordinates of the solution to the system of equations, $7x - y = 25$ and $x2 + y2 = 25$ ?
a) 3 and 4 b) -3 and 4 c) 3 and -4

d) -3 and -4 e) $- 4 --- 5$ and $- 7 --- 5$

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July 16, 2008