Which describes the lines y=7/8x + 12 and y=-8/7x+7

The measure of angle 0 is 600 degrees

Plz ( true - false) all triangles have interior angles whose measure sum to 90.

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?