Which graph shows the greatest integer function?

The triangles are similar. what is the value of x? show your work.

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=

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