Answers edited by 冠廷 李.

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• How do you solve `-8<=(3x+17)/2<3` and write the answer in interval notation?
  
• Question #0d91d
  
• What is the slope of the line that passes through `(1,7), (10,1)`?
  
• Question #07b93
  
• How do you find the roots, real and imaginary, of `y=x^2 - 5/2x + 1/2` using the quadratic formula?
  
• How do you simplify `(x+2) /(4x^2 - 14x + 6)-(x+4)/(x^2 + x -12)`?