Which expression is equivalent to w^10 z^4/w^10 z^-4 for all values of w and z where the expression is clearly defined? Answers:
A. 1
B. z^8
C. w^20
D. w^20 z^8

Which choice has the correct steps in graphing the solution set to the following inequality? -45_> 20x-5y

Factor this polynomial completely. x^2-8x+12

Which statement is true about the function f(x)= square root -x ? the domain of the graph is all real numbers. the range of the graph is all real numbers. the domain of the graph is all real numbers less than or equal to 0. the range of the graph is all real numbers less than or equal to 0.