Angle between the lines x 2y = 3 and 2x 4y = 15 ?.

Use the elimination method to solve the systems of equations. choose the correct ordered pair. 7x+4y=39

If value of cos330° is √3/2 then find tan165°.

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?