Tickets to a play cost $11 each. there is also a service charge of $4 per order. write an equation for the relationship that gives the total cost y in dollars for an order of x tickets

Amass weighing 16 pounds stretches a spring 8/3 feet. the mass is initially released from rest from a point 2 feet below the equilibrium position, and the subsequent motion takes place in a medium that offers a damping force that is numerically equal to 1/2 the instantaneous velocity. find the equation of motion if the mass is driven by an external force equal to f(t)=cos(2t).