The following transformation maps △abc to △a′b′c′.
(x, y)↦(x−4,y+1)
which answer correctly describes the transformation applied to △abc?
a. △abc is moved 1 unit right and 4 units down to create △a′b′c′.
b. △abc is moved 4 units right and 1 unit down to create △a′b′c′.
c. △abc is moved 4 units left and 1 unit up to create △a′b′c′.
d. △abc is moved 1 unit left and 4 units up to create △a′b′c′.

answer:

c

step-by-step explanation:

it just is trust me

area of part 1:

a1=base*height/2=(8+2)*(8-2-2-1)/2=10*3/2=15 ft^2

area of part 2:

a2=length*width=(8+2)*1=10 ft2

area of part 3:

a3=length*width=8*2=16 ft2

total shaded area : a1+a2+a3=41 ft2

total area of the reactangle : a=16*8=128 ft2

total area of the nonshaded region : 128-41=87 ft2

it is a. 4.2 because 7.6-3.4 gets the remaining length of 4.2. i might be wrong but i am pretty sure this is the answer.