CAN SOMEONE PLS HELP ME THIS IS 7TH GRADE MATH

What are the domain and range of the function f(x)=2^x+1

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

Simplify using positive exponents only.