Answers created by Bernardo Russo G. Ferreira

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• How do you simplify #-5\sqrt { 16x } + 7\sqrt { 9x } + 4\sqrt { 16x }#?
  
• Prove that #4^(2n)-1 # is divisible by #5 AA n in NN#?
  
• How do you simplify #\frac { 9a } { a - 2} - \frac { 18} { a - 2}#?
  
• Suppose that Kristin ate two hamburgers and drank three medium sodas​, for a total of 1139 calories.​ Kristin's friend Jack ate seven hamburgers and drank two two medium sodas​, for a total of 2346 calories. How many calories are in the hamburger?
  
• Question #5206c
  
• Question #0e76f
  
• How do you solve this system of equations: #-2x + y = - 4 ; - 6x + 3y = - 12#?
  
• Can you prove this using mathematical induction?
  
• How do you write an equation of the line that passes through (-3,4) and (1,0)?
  
• There is a rectangle with a width of 5x and a length of x + 4. How do you find the area of the rectangle?
  
• How do you find the polynomial function with roots 1, –2, and 5?
  
• Question #acdcc
  
• How do you prove #sin x = 1 - 2 cos^2x#?
  
• How do I use the intermediate value theorem to determine whether a polynomial function has a solution over a given interval?
  
• How do I multiply complex numbers in polar form?
  
• How does the domain of a function relate to its x-values?
  
• How do I find all real and complex zeros of #x^4 - 15x^2 - 75#?
  
• How do I find the magnitude of a vector?
  
• What are the elementary row operations of matrices?
  
• How do I find the polar equation for #y = 5#?
  
• What is the equation for a billing process that has a one-time fee of $100 and a monthly charge of $25?
  
• How do I find the equation of the line which passes through the points #(8, 1)# and #(-2, 3)#?
  
• How does acceleration affect momentum?
  
• What is a complex conjugate?
  
• How do I find the negative power of a complex number?
  
• How do I find the trigonometric form of the complex number #3i#?
  
• What is the formula for multiplying complex numbers in trigonometric form?
  
• What is the dot product of two vectors that are perpendicular?
  
• How do I find the angle between two vectors in three-dimensional space?