Answers created by Max K.

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• How do you solve this system of equations: #-5x - 7y = - 15 and 5x + 9y = 5#?
  
• Why is soil considered an abiotic factor and a biotic actor?
  
• Question #a4a88
  
• Helen spent 3/8 of her money at the first store she visited. She then spent 3/4 of her remaining money at the second store. If Helen had $20 left, how much money did she start with?
  
• How do you simplify #\frac { 9x + 19} { x ^ { 2} + 2x - 3}#?