Rotate shape A 180° with centre of rotation (2,-1)

Step-by-step explanation:

Ok, so there are rabbits and chickens

Rabbits have 4 legs and 1 head

Chickens have 2 legs and 1 head

So obviously we have a total of 39 animals

Let's make rabbits = x and chickens = y

So now we can make an equation for heads and and equation for legs.

Legs:

4x + 2y = 126

Heads:

x + y = 39

Now we can use substitution to solve.

If x + y = 39, then y = 39 - x

So,

4x + 2(39-x) = 126

Distribute and Combine like terms

4x + 78 - 2x = 126

2x + 78 = 126

2x = 48

x = 24

Plug x back in to the second equation

(24) + y = 39

y = 15

That means,

x = rabbits = 24

y = chickens = 15