Factor of 3x-3a+xy-ay

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

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?

Eric drove 275 miles in 5 hours. at the same rate how long would it take him to drive 495 miles?