Simplify this expression. 2q/16(q+r)

If x is 6, then 7x= a. 13 b. 42 c. 42x d. 76

If you could answer these your a life saver

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).