Answer:
Tony has to make 9 more sandwiches.
Explanation:
Given information: In morning Tony makes sandwiches.
Roast beef sandwiches = 50
Ham and cheese sandwiches = 75
Cheese sandwiches = 16
Total number of sandwiches he made is

His boss wants 150 sandwiches total. So, the number of more sandwiches must tony make is

Therefore, Tony has to make 9 more sandwiches.