Answers edited by St.Roller

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• The sum of the ages of five students is as follows: Ada and Bob is 39, Bob and Chim is 40, Chim and Dan is 38, Dan and Eze is 44. The total sum of all the five ages is 105. Questions What is the age of the youngest student? Who is the oldest student?
  
• How do you simplify #1-7-(2 times 2 ) + 6 times 2 # using order of operations?
  
• How do you subtract #(w ^ { 2} + 4w + 4) - ( w + 2)#?
  
• What is the expanded form of 0.045 in exponent ?
  
• How do you solve the rational equation #(x+1)/(x-1)=x/3 + 2/(x-1)#?
  
• What is the vertex of #f(x)=2x^2+4x-1# ?