Acar salesman earns a base salary plus commission for every car he sells. the expression shows the amount the salesperson earns, if he sells x cars in a month. 2,000 + 1,000x if the salesman doesn't sale a car, how much money does he earn for the month?

Aparticular telephone number is used to receive both voice calls and fax messages. suppose that 25% of the incoming calls involve fax messages, and consider a sample of 25 incoming calls. (a) what is the expected number of calls among the 25 that involve a fax message?