Answers edited by Roy D.

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• How do you solve # 10^(-x+4) +7 = 5#?
  
• What is the derivative of x to the x? d/dx (x^x)
  
• How to calculate these step by step ?
  
• How do I find #A# and #B# in the partial fraction decomposition #91x+269=A(x+4)^2+B(x+4)#?
  
• Statistics question?
  
• Solving this using riemann integral?
  
• How do you graph and solve #abs[ x - 3 ] <=5 #?
  
• The question is below?
  
• How do I find the limit as #x# approaches infinity of #tanx#?