A bowling alley charges a group rate of $7 for admission plus a fee to rent each pair of bowling shoes. A family rents 5 pairs of bowling shoes and pays a total of $22. Write and solve an equation to determine the cost of renting each pair of bowling shoes.

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?