Answers edited by John C.

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• How do you subtract the complex numbers `(6- 1i ) - ( 1- 5i )`?
  
• Can an object be in equilibrium if there is only one force acting on it?
  
• How do you differentiate `f(x)=cot^4(3x)`?
  
• What is the y-intercept of the line given by the equation y=9/2x - 4?
  
• Simplify `rootx(a^y)`? for example, `root8(5^6)`
  
• How do you multiply `(3x ^ { - 9} y ^ { 4} ) ( - 2x ^ { 2} y ^ { 7} )`?
  
• How do you solve `\frac { y - 1} { 3} = \frac { y + 1} { 6}`?
  
• How can physics improve car safety?
  
• How do you solve `7(4x +9)-13=-87`?
  
• How do you find the max or minimum of `f(x)=x-2x^2-1`?
  
• Question #5bad2
  
• Explain how it is possible for a ball to have kinetic and potential energy at the time?
  
• Question #fcd25
  
• How do you determine if `x-5` is a factor of `2x^3-4x^2-7x-10`?