Which image shows a counter-clockwise rotation of the blue quadrilateral pqrs 90° around the origin? !

With finding limits of multi variable !

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

Which property was used to simplify the expression? 3c+9 +4c=3c+4c+9