Answers edited by Cory Grand

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• If 3 is added to the number and denominator of a fraction and the result subtracted 'by' the original fraction, the difference is 1/15. The numerator of the original fraction is 6 less than the denominator. What is the original fraction?
  
• Is cesium bromide an ionic or covalent compound?
  
• How do I write an ellipse in standard form?
  
• A woman cycles 8 mi/hr faster than she runs. Every morning she cycles 4 mi and runs 2 1/2 mi, for a total of one hour of exercise. How fast does she run?