Heyy can some one pls helpp?

Ineed if you could explain and give me the answer you! this needs done

In the triangles, bc =de and ac fe.if the mzc is greater than the mze, then ab isdfelth

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.