Hamza made 6 calls in one day. Each call cost the same amount of money. The next day he made a call that cost $4. Which expression represents the total costs of the calls Hamza made during the two days?

Mahnoor randomly selects times to walk into a local restaurant and observe the type of music being played she found that the restaurant was playing country 11 times rock & roll 17 times and blues 8 times use the observed frequencies to create a probability model for the type of music the restaurant is playing the next time mahnoor walks in.