Frank solved an equation and got the results x=x. Sarah solved the same equation and got 16=16. Frank says that one of them is incorrect because you cannot get different results for the same equation. What would you say to frank? If both results are indeed correct, explain how this happened.

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?