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word problem help please

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2 Answers

C = 50d + 0.25X
 
    50 d + 0.25 X ≤100
 
 
    Graph :
 
    50 d + 0.25 X = 100   / d = days on vertical axis , X on horizontal axis
 
     ( 0 , 2 )      ( 400, 0) are the intercept points
 
    Test ( 0, 0) 
 
      50 ( 0 ) + 0.25( 0 ) ≤0 
 
   So left on the line from the intercept points should be marked as the solution.