Identify the missing link using a scale factor of 1/6

PLZ I NEED IT ASAP

Evaluate the expression for the given value of the variable 7a - 4a for a =8

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.)

If f(x) = 2x + 8 and g(x) = x4, what is (gº)?