Answers edited by Sudip Sinha

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• A circle's center is at #(3 ,9 )# and it passes through #(5 ,8 )#. What is the length of an arc covering #(7pi ) /4 # radians on the circle?
  
• What is the discriminant of #y= -3x^2 - 4x - 3# and what does that mean?
  
• How do you factor #x^2 + 3x - 10#?
  
• A circle's center is at #(1 ,5 )# and it passes through #(2 ,3 )#. What is the length of an arc covering #(pi ) /4 # radians on the circle?
  
• What is the equation of the line with slope # m= -6 # that passes through # (-11,3) #?