You can make 4 triangles out of a 3x3 square.
(Assuming dogs have 4 feet, birds have 2 and buyers have 2)
One possibility is 4 dogs, 2 birds and 2 buyers [16 + 4 + 4]
She wants to purchase shoes that cost $ 50
she wants to purchase socks that cost 2.20 each......so the expression for this is 2.20s...with s being the number of pairs of socks bought
and she only has $ 64....so she has to spend 64 or less...< = 64
so ur inequality would be :
50 + 2.20s < = 64.....subtract 50 from both sides
2.20s < = 64 - 50
2.20s < = 14...divide both sides by 2.20
s < = 14 / 2.20
s < = 6.36....so she can purchase 6 pairs of socks without going over
I wish i knew this answer to help you. i really hope u find it