Solving simultaneous equations by algebraic methods
3a+4x=29
2a-3x=-9

Which system of linear inequalities is represented by the graph? !

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.

Inez has a phone card. the graph shows the number of minutes that remain on her phone card a certain number of days.