Which is the equation of a parabola with vertex (0,0) and directrix x= -2?

Use the distance formula and the features with the definition of parabola unless you know the derived equation.

Directrix is the line on the other side of the focus from vertex. Directrix is x=8, for the general point (8,y). Parabola is the general point (x,y).

Distance from parabola to focus equals distance from parabola to directrix.

y2=-32X

x=1/x=y2

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk