Answer:
D. The system is in echelon form.
Step-by-step explanation:
Check attachment
Answer:
it is 234
Step-by-step explanation:
Well, it should be 45 because 1/3 of the game would be 15 and 15+15 is 30 (2/3rds cost), so 15+15+15, 45, would be the full cost of the game