See the attachment, i don't know how to get the answer

x = 4.5 cm.

Step-by-step explanation:

There are two rectangles in the compound shape ABCDEF.

The area of the small rectangle is x (x - 4) sq. cm.

Again the area of the large rectangle is (x - 2) (2x + x) = 3x (x - 2) sq. cm.

Therefore, the total are is x (x - 4) + 3x (x - 2) = 36 {Given}

⇒

⇒

⇒ (Shown)

Now, solving this equation we get

⇒

⇒ x = 4.5 and x = -2

Since x i.e. length of a side can not be negative. So, x = 4.5 cm. (Answer)

d

step-by-step explanation:

d

$8

step-by-step explanation:

it is pretty much backwards.

you take the 4x2 multiply that, and that is = $8