Easy math questions, I just don't have time

When using the linear combination metho e linear combination method to solve a system of linear equations, the four options are:

Which expression converts 45 degree to radians

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