Evaluate f(x) when x= 6.
-1 if 4 6

Suppose that the price p, in dollars, and the number of sales, x, of a certain item follow the equation 4 p plus 4 x plus 2 pxequals56. suppose also that p and x are both functions of time, measured in days. find the rate at which x is changing when xequals2, pequals6, and startfraction dp over dt endfraction equals1.5.

Im so bad at fractions they are not my best math thing to work on

Graph the function =gx+2x3 and give its domain and range using interval notation.