1. 1) Find the vertex of the parabola f(x) = x² - 16x + 63.
   
    
2. 2) Find the x- and y-intercepts of the cubic function f(x) = (x+4)(2x-1)(x-1).
   
    
3. 3) If  f(x) = x²-2x-24  and  g(x) = x²-x-30, find (f-g)(x).
   
    
4. 4) If  f(x) = x+4  and  g(x) = 2x²-x-1, evaluate the composition (g o f)(2).
   
    
5. 5) If  f(x) = x+4  and  g(x) = 2x²-x-1, find the composition (f o g)(x).
   
    
6. 6) Write the following sentence as an equation:  y varies directly as x.
   
    
7. 7) Write the following sentence as an equation:  x is directly proportional to y and is inversely proportional to the cube of z.