Answers edited by Truong-Son N.

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• How does pressure affect enthalpy?
  
• How do you write an equation of a line with (4, –4) and (9, –1)?
  
• How do you find the inverse function of #f(x) = (2x-3)/(x+4)#?
  
• How can I remember the first 18 elements in the Periodic Table?
  
• What is the derivative of #cos(pi/x)/x^2 #?
  
• What is #lim_(x->oo) x - sqrt(x^2 + 4x + 3)#?
  
• What is Square root of 2/3 + square root of 3/2?
  
• How do you use the integral test to determine whether the following series converge of diverge #sum n/((n^2+1)^2)# from n=1 to infinity? Thanks for the help !!! I have no idea on how to do these questions?
  
• What is the slope of #2x = -8#?
  
• How do you find the limit as (x,y) approaches (0,0) of #(x+y^2) / (2x+y)#?
  
• How do you calculate #Cos^-1(5/13) - Cos^-1(8/17)#?
  
• If the slope is 7, and the given coordinates are (x , 8) and (4 , 1), how do you find x?
  
• What is the sum of the arithmetic sequence 4, 11, 18 …, if there are 26 terms?
  
• How do you solve the system #2x+3y=12# and #4x-3y=6#?
  
• How do you find the derivative of #2^xln2#?
  
• A triangle has sides of lengths 4, 3, and 5 is it a right triangle?
  
• What is the density of water at #4^@ "C"#?
  
• What does it mean to translate a graph?
  
• Question #4e19a
  
• How do you simplify #(2y + 1 )/( y-2)#?
  
• How do you find the arc length of the curve #y=(x^2/4)-1/2ln(x)# from [1, e]?
  
• How do you use a half-angle formula to simplify #tan 195#?
  
• How do you simplify #(6sqrt3)/sqrt5#?
  
• How do you combine #2/x + 1/(x-2) + 3/(x-2)^2#?
  
• How do you verify the identity #[(cosx cotx)/1-sin x]-1=cscx#?
  
• How do you verify #(1+sinx+cosx)^2 = 2(1+sinx)(1+cosx)#?
  
• How do you find the exact value of #cos[arc tan(-2/3)]#?
  
• How do you use the vertical line test to show #x^2-4y^2+4=0# is a function?
  
• How do you find the limit of #e^(x-x^2)# as x approaches infinity?
  
• How do you find the equation of the tangent line to a derivative of a function #3x^2-12# at f'(1)?
  
• How do you use the half-angle formulas to find the exact value of #tan((3pi)/8)#?
  
• What is the slope of this equation y = 7?
  
• How can the factorial of 0 be 1?
  
• When we talk about an 1D-NMR spectrum (2-dimensional graph), what does the ordinate axis show?
  
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