Jenna says that the point (30,61) is on the line y = 2x-1 Is Jenna correct? Explain how u know?​

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?