Answers created by Hotrod22

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• When viewing a picture of the circulatory system, what do the red and blue blood vessels mean?
  
• How do you factor #y= x^2 +6x+8# ?
  
• Who set up a five-year plan for the operation of the Soviet Union?
  
• What is the equation of the tangent line of #f(x)=(2x+1)(x+2) # at #x=2#?