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1. C 2. B / x^2+3x+2=0 3. C 4. A / -4,2 5. B / one real solution 6. B / 0.73 seconds or 1.46 seconds 7. B / 40 inches by 64 inches 8. C / x=4 or x=6 9. B / $310 at $2 per kilogram 10. B 11. C / (x-1)(x+5) 12. D / y=-2(x+5)^2+9 13. False 14. true 15. false