Answers edited by FRANK Z.

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• What are the answers and how do you solve them?
  
• How do you solve #0.5=4.1x-2(1.3x-4)#?
  
• How do you simplify #sqrt3*3sqrt21#?
  
• A cone has a height of #15 cm# and its base has a radius of #9 cm#. If the cone is horizontally cut into two segments #6 cm# from the base, what would the surface area of the bottom segment be?
  
• The point (-2 and -4) is in which quadrant of a coordinate grid?