Please help me solve this problem!!

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

8.74 rounded to the nearest whole number

Write a function rule for  “the output is  5 less than the input.” let  x be the input and let  y  be the output.