The appropriate formula model would be (B x 2)+(H x 2)so when you plug in the numbers it would be (12 x 2) + (14 x 2) start doing the math and you get 24 + 28 which adds up to 52 inches and that is your perimeter
Hey so the answer would be 350 because it would be all added up
Y = 8x + 12
if x = -6
y = 8(-6) + 12
y = -48 + 12
y = - 36
if y = 13
13 = 8x + 12
13-12 = 8x
8x = 1
x = ¹/₈ ≈ 0.125