Answer:
$18
Explanation:
The cost, c, of a ham sandwich at a deli varies directly with the number of sandwiches, n. c = $54 when n is 9
This means that to buy 9 sandwiches, it costs $54. So one sandwich costs 54/9 = $6.
What is the cost of the sandwiches when n is 3?
To buy three sandwiches, it costs $6*3 = $18.
So the correct answer is:
$18