1+1-1+1-1-1-1-1-1-1-1-1-1-1-1-1-1 x 23 + 4

Solve for x by completing the square. 2x^2-4x+7=0

Which statement about perfect cubes is true

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?