Apizza restaurant offers 21 different toppings how many 5 toppings pizzas can be created if each topping can be used only once

Which of the following will form the composite function?

Given abc find the values of x and y. in your final answer, include all of your calculations.

Becca wants to mix fruit juice and soda to make a punch. she can buy fruit juice for $3 a gallon and soda for $4 a gallon. if she wants to make 28 gallons of punch at a cost of $3.25 a gallon, how many gallons of fruit juice and how many gallons of soda should she buy?