Let X and Y are two independent random variables. Suppose that we know Var(2X-Y)=6 and Var(X+2Y)=9,then find Var(X) and Var(Y)

Ms.ortiz sells tomatoes wholesale. the function p(x)=-80x^2+320x-10, graphed below, indicates how much profit she makes on a load of tomatoes if she makes on a load of tomatoes if she sells them for 4-x dollars per kilogram. what should ms.ortiz charge per kilogram of tomatoes to make on a load of tomatoes?