It costs $1.79 to buy ¿ lb of chocolate chips.
How much would it cost to purchase 6 lbs of chocolate chips?

Which of the following expressions are equivalent ?

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.

Which system of linear inequalities is represented by the graph?