Which expression is equivalent to (-18) - 36n?

Which fraction below is equivalent to 10/12?

Suppose that the price p (in dollars) and the weekly sales x (in thousands of units) of a certain commodity satisfy the demand equation 4p cubedplusx squaredequals38 comma 400. determine the rate at which sales are changing at a time when xequals80, pequals20, and the price is falling at the rate of $.20 per week.

Alogical argument that is presented in graphical form using boxes and arrows is called?