HELP for the function f defined by f(x)=3x^3-2x+5 find f(-x), -f(x), and -f(-x)

The cost c, in dollars, for bananas depends on the weight w,in pounds, of the bananas. this situation is represented by the function rule c=0.5w (graph each function rule.tell whether the graph is continuous or discrete)

7x+8y=-18, 4x-9y=-3 solve the system of equations

Solve 2^x=32 and rewrite this equation in a logarithmic form