Notebooks were bought at $.75 each and marked up 75%. What is the sale price?

Linda loans her friend $250 with a 5% monthly intrest rate. how much was the whole loan?

Which coefficient matrix represents a system of linear equations that has a unique solution ? options in photo*

Due to a packaging error, 4 cans labeled diet soda were accidentally filled with regular soda and placed in a 12 pack carton of diet soda. two cans were randomly selected from this 12 pack. what is the probability that both cans were regular soda?