PLS HELP idk how to do this

What is the lcm of 16 and 40 ? 24 and 40 ?

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)

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