Answers edited by John P

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• How do you solve #x(x+4)=0#?
  
• Question #713f2
  
• How do you solve #-n/7=-50#?
  
• There are 114 students in all of the fourth-grade combined. For Field Day, they need to make 9 teams. How many students will be on each team?
  
• Why does the Moon orbit Earth?
  
• How much heat is given off when 10 grams of water are cooled from 50°C to 40°C?