factoring by grouping example ?? i need one pls

Find an equation of the line perpendicular to the graph.

Use the elimination method to solve the systems of equations.choose the correct ordered pair. 7x+4y=39

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