Identify the variable expression that is NOT a polynomial: A. x^2+2

B. y^6+x^2

C. 24

D. x^-4+y^2

Help pls

Aclothing store has the sign shown in the shop window. pani sees the sign and wants to buy 3 shirts and 2 pairs of jeans. the cost of each shirt before the discount is $12, and the cost of each pair of jeans is $19 before the discount. write and simplify an expression to find the amount pani pays if a $3 discount is applied to her total