Answers edited by Rafael

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• How do you determine the constant of variation for the direct variation given #y = 8x #?
  
• How do you find the inverse of #f(x) = 6x - 4#?
  
• How do you solve the identity #cos3x = 4cos^3x - 3cosx#?
  
• How do you solve #x-(3/x) = -2#?
  
• How do you prove # (sin+cos)(tan+cot)=sec+csc#?
  
• Question #d94de
  
• Two corners of an isosceles triangle are at #(2 ,5 )# and #(9 ,8 )#. If the triangle's area is #12 #, what are the lengths of the triangle's sides?
  
• How do you solve #7=5e^(0.2x)#?
  
• How do you express the phrase "a number z divided by 19" as an algebraic expression?
  
• How do you write an equation of the quadratic function whose graph contains the points (-4,-57), (2, 39), (5, 168)?
  
• How do you find the domain and range of #f(x) = x / (3x(x-1))#?
  
• How do you simplify 5 square root 10 times 2 square root 8?
  
• How do you simplify # cot(x) *sec(x)#?
  
• How do you solve #3sinx + 2 = 0# from 0 to 2pi?
  
• How do you use synthetic division to divide #(x^4 + 2x^3 - 2x - 1) ÷ (x^3 + 3x^2 + 3x + 1)#?
  
• If Vector B is added to Vector A , the result is 8.8 i +4.8 j. If Vector B is subtracted from Vector A, the result is -5.6 i + 6.8 j . What is the magnitude of vector A ?
  
• How do you solve #9 cos^3 x − 63 cos^2 x + cos x − 7 = 0 #?
  
• What is the equation of the line with slope # m= 1/3 # that passes through # (-7/15,-5/24) #?
  
• How do you identify the important parts of #x^2-2x-8=0# to graph it?
  
• How do you graph and find the discontinuities of #F(x) = (-2x^2 + 1)/(2x^3 + 4x^2)#?