Answers edited by Angel F.

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• Do red blood cells have a cytoplasm and cell membrane?
  
• Is osmosis a form of active transport or passive transport?
  
• How do you solve the system by substitution #y = 4x + 12# and #y = 2x + 8#?
  
• Question #68906
  
• What is the solution to the system of equations #y = 2x-1# and #y = -x + 5#?
  
• True or false? Too concentrated blood is a signal for production of antidiuretic hormone (ADH) Thanks
  
• A car advertisement states that a certain car can accelerate from rest to 70 km/h in 7 seconds. What is the car's average acceleration?
  
• How do you solve the following system?: # -x+5y=7 , x=-3x + 4y-17 #