Help me please with this?

For what value of jn is mn parallel to kl

What are the constants in this expression? -10.6+9/10+2/5m-2.4n+3m

Arestaurant offers a $12 dinner special that has 5 choices for an appetizer, 12 choices for an entrée, and 4 choices for a dessert. how many different meals are available when you select an appetizer, an entrée, and a dessert? a meal can be chosen in nothing ways. (type a whole number.)