Which expression is a factor of 21x2 + 13x – 20?​

How do you convert 1.27 to a percentage

For what value of (y) is 3^3/3^y =1/9

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.