A car of mass 775 kg traveling at a velocity of 30 m/s in the positive x-direction crashes into the rear of a truck of mass 1,475 kg that is at rest and in neutral at an intersection. If the collision is inelastic and the truck moves forward at 11.9 m/s, what is the velocity of the car after the collision? (Indicate the direction with the sign of your answer. Assume the collision is head-on so that the motion of both vehicles remains entirely along the x-direction)