Answers created by Samuel A.

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• For what value(s) of k do the parabolas y=x²+2x-k and y=3x-1 intersect at exactly two points?
  
• Can bacteria cells have cilia?
  
• How do you find the domain and range of #sqrt(x - 1)#?
  
• Question #14352
  
• How do you factor #y^2 + 0.4y + 0.04#?