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OpenStudy (anonymous):
If y=-x^2+14x+7 then x=10 is a counterexample for which conjecture? A. y is always positive. B. y is always negative. C. y is a function of x. D. The graph of y is a parabola.
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OpenStudy (anonymous):
i think it might be B because it says counterexample
OpenStudy (anonymous):
okay thanks so much
OpenStudy (anonymous):
welcome
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