Patti went to the bakery. she bought a loaf of bread for $3.49, 6 muffins that cost $1.25 each, and and bottle of juice for $1.79. she gave the cashier a $20 bill

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.