What is the y-intercept?

If the discriminant if a quadratic equation is 4 which statement describes the roots?

Which type of graph would allow us to compare the median number of teeth for mammals and reptiles easily

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.