Answers created by Nick

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• How do you solve #9=7z-13z-21#?
  
• How do machines make work easier if they do not decrease the amount of work you need to do?
  
• What determines if an atom is electrically charged or electrically neutral?
  
• What is the derivative of #arctan (cos 2t)#?
  
• If one cart was at rest, and was struck by another cart of equal mass, what would the final velocities be for a perfectly elastic collision? For a perfectly inelastic collision?
  
• How do you solve #6+ \frac { P } { 9} = 5#?
  
• What is the slope of a line that is parallel to the line #y = x + 7#?
  
• How do you solve #abs(7-y)=4#?
  
• Simplify (-i #sqrt 3# )#^2# . how do you simplify this?
  
• The perimeter of a rectangle is 24 in. and its length is 3 times its width. What are the length and the width of the rectangle?
  
• How do you graph using slope and intercept of #2x-3y=7#?
  
• Is #f(x)=(x-9)^3-x+15# concave or convex at #x=-3#?
  
• How do you differentiate y=(2+sinx)/(x+cosx)?
  
• How do you simplify #sqrt4*sqrt3#?
  
• How do you solve #5x = \sqrt { 74x + 3}#?
  
• How do you find the domain and range of # 2(x-3)#?