1 Select the solutions to the following absolute value equation: [3x - 6] + 9 = 12

a x = -3 or x = -1
b x = 9 or x = 12
c x = 3 or x = -5
d x = 3 or x = 1

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?