Graph each set of lines to form a triangle. Find the area and perimeter. x = 4, y = −3, and y = −2x + 7

I got the graphing bit down but need help with the rest please

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)

Which is the equation of an ellipse with directrices at x = ±4 and foci at (2, 0) and (−2, 0)?

Find dy/dx using implicit differentiation ln(20+e^xy)=y