What is the greatest common factor of 20, 45x?

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?

Yuto solved the equation below. what is the solution to yuto’s equation?

Brad earns $12.75/hr and works 40 hours a week. what is his gross annual income?