What is 3y +5x = -15 written in slope-intercept form? Y=5/3x+5
Y=-5/3x-5
Y=5/3x-5
Y=-5/3x+5

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).