PLS HELP THIS IS HARD ANYONE PLS HELP

Step-by-step explanation:

The triangle ABC(on the right hand side) is mirrored about the y-axis and translated one unit in the direction of the negative y-axis and the result the triangle DFE(on the left hand side)

Note that the same result can be obtained by translating then mirroring.

The Size(Area) is actually the same.

So basically If its coordinates was ( x , y )

it's now ( -x , y-1 )

(- minus) Due to Mirroring

(-1) duo to Translating in the negative direction

if you was gonna solve for a, a is a   < -12