Question in the picture below

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?

If you prove that ∆wxz is congruent to ∆yzx, which general statement best describes what you have proved?

Segment wx is shown explain how you would construct a perpendicular bisector of wx using a compass and a straightedge