Answers created by Roman G.

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• How do you simplify #(7^2/3)^(5/2)#?
  
• What is the solution set of the system #4x+y=12# and #15x+y=45#?
  
• How do you solve #\frac { 2} { 3} ( n + 5) = \frac { 3} { 4} ( n - 1)#?
  
• How do you simplify #3sqrt(75)-5sqrt(100)#?
  
• How do you solve #4x^2 +4x = 15# using the quadratic formula?
  
• What is #6 9/10-1/6#?
  
• What are the mean and standard deviation of {34, 98, 20, -1200, -90}?
  
• How do you use the chain rule to differentiate #y=1/(t^2+3x-1)#?