Amobile phone carrier charges an extra fee if a customer uses more than 500 minutes each month. tom has already used 230 minutes this month. which in e quality can be used to determine how many more minutes tom can use this month without going over the 500 minute limit?

Anyone know? will mark brainliest if you're correct!

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.

Drag the tiles to the boxes to form correct pairs. not all tiles will be used. match each set of vertices with the type of quadrilateral they form.