Given: -7x < -21. Choose the solution set.

{x | x < 3}
{x | x > 3}
{x | x < -3}
{x | x > -3}

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.

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?

3x + 4y = 5 x- 3y = -7 solve by substitution