Which equation models this problem? carol paid $271 to rent a car for 4 days. what was the rate, r, per day to rent the car? a: 27]r=4 b: r/271=4 c: r=4/271 d: 4r=271

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.