Plzzz help me I need this please

Asystem of equation is shown below 6x - 2y equals 3 . and 5x + 3y equals 4. would you solve by substitution or elimination? and why

Find the volume of the solid generated when the region bounded by y= x and y= 4√x is revolved about the x-axis the volume of the solid is: (type an exact answer cubic units)

5,600 x 10^3 = a) 560 b) 5,000,600 c) 5,600,000 d) 56,000