15 is 9 more than j. as an equation.

The square root of 9x plus 7 plus the square rot of 2x equall to 7

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).

The formula to determine energy is e=1/2mv2? what is the formula solved for v?