What is the area of the right triangle of the hypotenuse is 4 radical 2

One line passes through (-7,-4) and (5,4) . another line passes through the point (-4,6) and (6,-9)

Which expression is not a polynomial?

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?