You and same friends have $30. You want to order large pizzas (p) that are $9 each and drink (d) that costs $1 each. Write an inequality that shows how many pizzas and drinks can you order.

Question

You and same friends have $30. You want to order large pizzas (p) that are $9 each and drink (d) that costs $1 each.  Write an inequality that shows how many pizzas and drinks can you order.

anonymous · Answer

if number of pizzas is p and number of drinks is d then total amount is 30$ 
=>  9p+d = 30. p and d are positive integers.

possible pairs are (3, 3), (2, 12), (1, 21)